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anonymous

  • 5 years ago

Can someone PLEASE give me a 7th grade algebra equation, and show me how to solve it?

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  1. amistre64
    • 5 years ago
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    7x + 10 = 59

  2. anonymous
    • 5 years ago
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    2x + 1 = 3 undo +1 by -1 from both sides to get balanced 2x=2 divide both sides by 2 x=1

  3. anonymous
    • 5 years ago
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    So, you would have to go through the order of operations, and start with the... ugh

  4. anonymous
    • 5 years ago
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    i'm so stupid >:(

  5. anonymous
    • 5 years ago
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    inverse operation + and -, x and /

  6. amistre64
    • 5 years ago
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    we can start simpler: how about: x+3 = 5

  7. anonymous
    • 5 years ago
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    that would be 2

  8. amistre64
    • 5 years ago
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    you are correct, but why is it 2?

  9. anonymous
    • 5 years ago
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    because 3- 5=2

  10. anonymous
    • 5 years ago
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    always undo addition or subtraction first then multiplication or division...you got it!

  11. anonymous
    • 5 years ago
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    :D so, can you give me a harder one?

  12. amistre64
    • 5 years ago
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    almost correct :) 5 - 3 = 2

  13. anonymous
    • 5 years ago
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    5-3 = 2

  14. anonymous
    • 5 years ago
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    wait what did i say?

  15. amistre64
    • 5 years ago
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    3 - 5 = -2

  16. anonymous
    • 5 years ago
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    oops thats what i meant... that would be a negative right?

  17. anonymous
    • 5 years ago
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    yes!

  18. anonymous
    • 5 years ago
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    sweet

  19. anonymous
    • 5 years ago
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    very good!

  20. amistre64
    • 5 years ago
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    but lets step thru this easy one so you can know what is going on underneath it all. It does no good to simply go ..thats an easy one! and give the answer right?

  21. anonymous
    • 5 years ago
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    true

  22. anonymous
    • 5 years ago
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    P.E.M.D.A.S.

  23. amistre64
    • 5 years ago
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    x + 3 = 5 that equal sign means that we want to keep things in balance, have you ever played on a seesaw?

  24. anonymous
    • 5 years ago
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    yes

  25. amistre64
    • 5 years ago
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    what happens when the kids on each end weigh the same?

  26. anonymous
    • 5 years ago
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    one will have to push off to make them move, or else it will be balanced. and that would still be 2

  27. amistre64
    • 5 years ago
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    correct :) now, we want to keep our equation balanced at ALL TIMES!! otherwise it becomes a lie...and lies are bad :)

  28. anonymous
    • 5 years ago
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    yes... haha

  29. amistre64
    • 5 years ago
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    if we want to solve for "x" we need to get it all by itself so we can ask it some personal stuff.... we need to get rid of all that stuff that is attached to it right?

  30. anonymous
    • 5 years ago
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    yeah... so you would have to follow order of operations?

  31. amistre64
    • 5 years ago
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    order of operations is good to know, and we will get to that sometime.. but lets take this step by step so we understand the basics that every other problem you come across will face ok?

  32. anonymous
    • 5 years ago
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    ok. i'm sorry i suck at math :/

  33. anonymous
    • 5 years ago
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    those are the basics just remember to use the order of operations backwards ; )

  34. amistre64
    • 5 years ago
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    so lets look at the (x+3). its got extra stuff; it has a (+3) sticking to it right? If we could get this to be more like (x+0) that would be great right?

  35. anonymous
    • 5 years ago
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    yes i think?

  36. amistre64
    • 5 years ago
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    does x+0 = x?

  37. anonymous
    • 5 years ago
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    yes

  38. amistre64
    • 5 years ago
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    then we want x+0 :) how do we get rid of (+3) and turn it into "0"??

  39. anonymous
    • 5 years ago
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    ummmmm.... put it in parenthises?

  40. anonymous
    • 5 years ago
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    NO

  41. amistre64
    • 5 years ago
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    i wish lol

  42. anonymous
    • 5 years ago
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    WE WOULD SUBTRACT

  43. amistre64
    • 5 years ago
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    thats correct, we would take away 3. So lets do that here: x+3-3 = 5-3 because if we take away from one side we gotta take away from the other right?

  44. anonymous
    • 5 years ago
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    yeah. so x would equal 2?

  45. amistre64
    • 5 years ago
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    it will....but lets see why. we get x+0 = 2 from this. And we all no that zero is pretty useless...not!! x+0 = x, and thats important to know :) so x = 2

  46. anonymous
    • 5 years ago
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    ahhh i understand.

  47. anonymous
    • 5 years ago
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    wait where did you get the 5?

  48. anonymous
    • 5 years ago
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    oh no nevermind.

  49. amistre64
    • 5 years ago
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    I dug around in the recesses of my brain and pulled it out to create a 7th grade algebra question for you lol

  50. anonymous
    • 5 years ago
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    :D

  51. amistre64
    • 5 years ago
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    tell me what I do with this one now: t - 4 = 3

  52. anonymous
    • 5 years ago
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    turn the 4 into 0? i think i know the answer to this though

  53. anonymous
    • 5 years ago
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    1?

  54. amistre64
    • 5 years ago
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    lets turn the 4 into how? we have t - 4 .... what doe we do to turn it into t+0 ??

  55. anonymous
    • 5 years ago
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    O.O

  56. amistre64
    • 5 years ago
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    4 into 0 how...

  57. anonymous
    • 5 years ago
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    oh subtract

  58. amistre64
    • 5 years ago
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    lets try that and see if it works ok? t - 4 - 4 = 3 t - 8 = 3 .... that didnt do us much good did it? lets go back to: t - 4 = 3

  59. anonymous
    • 5 years ago
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    ok. so would we change it to 4-3=t?

  60. amistre64
    • 5 years ago
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    stay with me now :) do you see that t is attached to a (-4)? t-4

  61. anonymous
    • 5 years ago
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    ¿:ı

  62. anonymous
    • 5 years ago
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    yes

  63. anonymous
    • 5 years ago
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    a negative 4?

  64. amistre64
    • 5 years ago
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    good, yes :)

  65. amistre64
    • 5 years ago
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    how do we get rid of a -4?

  66. anonymous
    • 5 years ago
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    add 4

  67. amistre64
    • 5 years ago
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    exactly :)

  68. amistre64
    • 5 years ago
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    lets try it out: t -4+4 = 3+4 t-0 = 7 t = 7

  69. anonymous
    • 5 years ago
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    i think i understand that.. but why wouldn't the 3 be a negative if its... wait i'm confusing myself....

  70. amistre64
    • 5 years ago
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    we add 4 to EACH side right? t -4+4 = 3+4 what does 3+4 =?

  71. anonymous
    • 5 years ago
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    7....

  72. anonymous
    • 5 years ago
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    OH

  73. anonymous
    • 5 years ago
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    i understand

  74. amistre64
    • 5 years ago
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    good :)

  75. amistre64
    • 5 years ago
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    wanna try another one?

  76. anonymous
    • 5 years ago
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    thanks you for doing this for me. and yes please

  77. anonymous
    • 5 years ago
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    2x+8=16

  78. anonymous
    • 5 years ago
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    you have to do the oppsite \

  79. anonymous
    • 5 years ago
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    ¿:ı

  80. amistre64
    • 5 years ago
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    youre welcome: lets try something related, but different now. we will get to that one soon enough

  81. anonymous
    • 5 years ago
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    ok

  82. amistre64
    • 5 years ago
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    5x = 15

  83. anonymous
    • 5 years ago
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    sounds good

  84. anonymous
    • 5 years ago
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    -8 both sides

  85. anonymous
    • 5 years ago
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    2x+8=16

  86. anonymous
    • 5 years ago
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    ummm 5x would be like, 5• 5?

  87. amistre64
    • 5 years ago
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    it would be the same concept as 5*5 right.

  88. anonymous
    • 5 years ago
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    so... would you be solving for x in that equation?

  89. anonymous
    • 5 years ago
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    2x+8=16 -8 -8 2x=8 2x/2=8/2 x=4

  90. amistre64
    • 5 years ago
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    yes. if we add to get rid of a subtraction. And we Subtract to get rid of an addition; what do youthink we might do to get rid og a multiplier?

  91. anonymous
    • 5 years ago
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    oh xcrap.. divide?

  92. anonymous
    • 5 years ago
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    i hpoe this helps

  93. amistre64
    • 5 years ago
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    divide is correct:)

  94. anonymous
    • 5 years ago
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    2x+8=16 -8 -8 2x=8 2x/2=8/2 x=4

  95. anonymous
    • 5 years ago
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    that one

  96. anonymous
    • 5 years ago
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    i suck at dividing :D thanks for being patiant

  97. anonymous
    • 5 years ago
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    do you get my eample

  98. amistre64
    • 5 years ago
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    we dont have to know alot about division for this really; we only have to know that any number divided by itself equals 1

  99. anonymous
    • 5 years ago
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    ok

  100. anonymous
    • 5 years ago
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    sarhouse

  101. amistre64
    • 5 years ago
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    why is the number 1 important to us in multiplying?

  102. anonymous
    • 5 years ago
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    2x+8=16 -8 -8 2x=8 2x/2=8/2 x=4

  103. anonymous
    • 5 years ago
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    yes... so.... what would we divide? 5 ÷ 5? that would =1

  104. amistre64
    • 5 years ago
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    correct

  105. anonymous
    • 5 years ago
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    because... its like a place holder? i have no idea

  106. amistre64
    • 5 years ago
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    what does 1 times a number =? x * 1 = ?

  107. anonymous
    • 5 years ago
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    5x=15 /5 /5 x=3

  108. anonymous
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    that would be x... just like 10 • 1= 10

  109. amistre64
    • 5 years ago
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    you are correct :)

  110. anonymous
    • 5 years ago
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    sarahouse i sloved it

  111. anonymous
    • 5 years ago
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    so, the answer is.....

  112. anonymous
    • 5 years ago
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    its sarahrose

  113. amistre64
    • 5 years ago
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    sara1000: solving it is not the issue :)

  114. amistre64
    • 5 years ago
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    5x = 15 you say we need to divide by 5 correct? do we do that to both sides?

  115. anonymous
    • 5 years ago
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    and i'm kind of ignoring what you say sarah1000 nothing personal, but amistre64 is helping alot

  116. anonymous
    • 5 years ago
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    yeah... so.... would we get rid of the x?

  117. amistre64
    • 5 years ago
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    the x we want to keep, its gona tells us its secrets when we get it all alone :)

  118. anonymous
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    WOA haha XD so.. do we get rid of anything?

  119. anonymous
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    5x=15 /5 /5 x=3 its that easy first you do the oppsisite of mulipling 5x is divison then you divided 5 form both sides to get x by it self then you divded it and you get 3

  120. amistre64
    • 5 years ago
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    we can remove that 5 from it by division: 5x/5 = x ok? 5x/5 = 15/5 x = 15/5 is our answer. You can reduce it some if you want, but a calculator will accept it as is ;)

  121. anonymous
    • 5 years ago
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    15/3=3 becuase on the other side you dont have to divided it all you have to do it cross out the 5 beacuse its the same the you write x=3

  122. anonymous
    • 5 years ago
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    what is the /?

  123. anonymous
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    oh a fraction?

  124. anonymous
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    divison

  125. anonymous
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    ¿:ı

  126. amistre64
    • 5 years ago
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    when typing out on a keyboard, we represent the fraction bar, which is also a division bar, by "/"

  127. anonymous
    • 5 years ago
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    easy

  128. anonymous
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    ooooh

  129. anonymous
    • 5 years ago
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    sara please im trying >:(

  130. anonymous
    • 5 years ago
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    ok

  131. amistre64
    • 5 years ago
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    suppose we have somethig like this to solve: 4x = 3

  132. anonymous
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    am try to make you understand

  133. anonymous
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    we would do he same thing as the first time? just, 4 times itself?

  134. anonymous
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    how diid you become a superhero

  135. amistre64
    • 5 years ago
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    i taught my kids to walk by encouraging them to take baby steps :) not by pushing them down :)

  136. amistre64
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    we would divide by 4 that is correct :)

  137. anonymous
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    wow how old are you? lol not trying to be mean

  138. amistre64
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    older than my kids ;)

  139. anonymous
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    so.. (4•4)=3?

  140. anonymous
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    haha

  141. amistre64
    • 5 years ago
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    we need to "divide" by 4, not multiply. remember. 4x/4 = 3/4 x = 3/4 do you see it?

  142. anonymous
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    amistre64

  143. anonymous
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    yes ¿:) i think

  144. amistre64
    • 5 years ago
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    yes sara?

  145. anonymous
    • 5 years ago
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    how do you make people be your fan

  146. anonymous
    • 5 years ago
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    right next to their name it says "Become A Fan" click it

  147. amistre64
    • 5 years ago
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    i dont make anyone be my fan..... they just like pushing little thumb buttons for all I know ;)

  148. anonymous
    • 5 years ago
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    :)

  149. anonymous
    • 5 years ago
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    its because you are so much better then searching the internet and only getting 1 minute free trials

  150. amistre64
    • 5 years ago
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    Lets try another one. r/3 = 2 since this is divisiion stuck to the "r" what do we need to do?

  151. anonymous
    • 5 years ago
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    uhhhh :ı

  152. amistre64
    • 5 years ago
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    we got 4 option: addition subtraction multiplication and division. we already know when to add and subtract, and this doesnt look like those. we know to divide when its stuck by multiplication.....so what should we do when its stuck by division? yor best guess

  153. anonymous
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    multiply... and we would have to do that on both sides?

  154. amistre64
    • 5 years ago
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    that is correct!!

  155. anonymous
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    sweet~! i'm sorry ill brb

  156. anonymous
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    sara can you become my fan

  157. amistre64
    • 5 years ago
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    r/3 = 2 when you get back, let me know what we need to multiply both sides by :)

  158. amistre64
    • 5 years ago
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    sara1000, since you know how to do the algebra ill be your fan ;)

  159. anonymous
    • 5 years ago
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    ok

  160. anonymous
    • 5 years ago
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    M IN 8 GRADE

  161. amistre64
    • 5 years ago
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    8th grade is a pretty big accomplishment :)

  162. anonymous
    • 5 years ago
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    ok

  163. amistre64
    • 5 years ago
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    it takes alot of work to get out of 5... or so my daughter would have me beleive :)

  164. anonymous
    • 5 years ago
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    where is sararose

  165. amistre64
    • 5 years ago
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    dunno, floated off into the ether to dance with the stars i spose...

  166. anonymous
    • 5 years ago
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    im so sorry i had to take the neighbor a cassorole dish

  167. anonymous
    • 5 years ago
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    srarose become my fasn plz

  168. amistre64
    • 5 years ago
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    tuna cassarole? bean cassarole? mac and cheese cassarole?

  169. anonymous
    • 5 years ago
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    i have no idea lol. what sucks is the werent even there.

  170. amistre64
    • 5 years ago
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    :) so, where were we... r/3 = 2 .... you say we multiply...by what?

  171. anonymous
    • 5 years ago
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    by the 3?

  172. anonymous
    • 5 years ago
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    sarose

  173. anonymous
    • 5 years ago
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    plz be my fan

  174. amistre64
    • 5 years ago
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    thats correct :) lets try it and see..... 3 * r/3 = 2 * 3 1*r = 6 r = 6 hey, it worked :)

  175. anonymous
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    i am your fan

  176. anonymous
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    ok

  177. anonymous
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    ok.. so 6/3=2?

  178. anonymous
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    makes sense

  179. amistre64
    • 5 years ago
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    yes :)

  180. anonymous
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    sweet :)

  181. amistre64
    • 5 years ago
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    all the problems your ever going to run itno, will use these 4 basic operations to solve.

  182. anonymous
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    ok...

  183. amistre64
    • 5 years ago
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    with practice, youll be better at it than me :)

  184. anonymous
    • 5 years ago
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    i doubt that! haaha are you like a teacher or something? and can u give me a harder one too?

  185. amistre64
    • 5 years ago
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    I suppose I am an "or something" :)

  186. anonymous
    • 5 years ago
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    haha

  187. anonymous
    • 5 years ago
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    i just realized that this site is.. like twitter! lol

  188. amistre64
    • 5 years ago
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    the hardest one youll come across in algebra classes will tend to be like this: 2x^2 -6x -4 = 0 and solve for x :)

  189. anonymous
    • 5 years ago
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    ¿:ı what is the ^?

  190. amistre64
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    its a symbol used for an exponent. if you havent seen exponents yet...yuo will :)

  191. amistre64
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    2^2 = 4 3^2 = 9 4^2 = 16

  192. amistre64
    • 5 years ago
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    x^2 = x*x = x^2

  193. anonymous
    • 5 years ago
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    i have in class.. but i'm like the dumbest one in math, and im in college level in reading! l

  194. anonymous
    • 5 years ago
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    oh

  195. anonymous
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    ¿:ı

  196. amistre64
    • 5 years ago
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    lets keep these equations linear for you to practice with :)

  197. anonymous
    • 5 years ago
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    isnt it like 3^3 would be 3 times 3 times 3?

  198. amistre64
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    thats right

  199. amistre64
    • 5 years ago
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    there is another symbol used called a factorial: 4! means 1*2*3*4 6! means 1*2*3*4*5*6

  200. anonymous
    • 5 years ago
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    is there a way to close the group chat thing? i can't friggin concintrate

  201. anonymous
    • 5 years ago
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    oh thats weird 4! sounds like an excied 4 lol

  202. amistre64
    • 5 years ago
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    nah, I suggested they move it somewhere else, but they seem to think its in a good spot

  203. anonymous
    • 5 years ago
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    butbut how is that different? then just plain 4?

  204. amistre64
    • 5 years ago
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    4 = 1+1+1+1 = 4 4^4 = 4 *4 *4 *4 = 256 4! = 1* 2 * 3 * 4 = 24

  205. anonymous
    • 5 years ago
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    oh... so like 4+2! would still = 2?

  206. amistre64
    • 5 years ago
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    lets see :) 4 + 2! = 4 + (1*2) = 4 + (2) = 6

  207. anonymous
    • 5 years ago
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    but isn't 1 • 2 just going to = 2?

  208. anonymous
    • 5 years ago
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    oops i didnt't mean = 2 i meant 6. lol

  209. amistre64
    • 5 years ago
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    thats right. 1*2 = 2 :)

  210. anonymous
    • 5 years ago
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    oh sweet. so, if you had 3 • 4! it would be (24•3) right

  211. amistre64
    • 5 years ago
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    exactly :)

  212. amistre64
    • 5 years ago
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    its just a short way for writing large numbers...thats all. 512! is easier and quicker to write than whatever number that actually equals :)

  213. anonymous
    • 5 years ago
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    oooooooooh :D

  214. anonymous
    • 5 years ago
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    so... what would a difficult- like 7th grade prblem be

  215. amistre64
    • 5 years ago
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    3x -7 = 8 ; now the trick becomes knowing what to do first in this one:)

  216. amistre64
    • 5 years ago
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    i remember it this way; first get rid of the neighbors then get rid of the spouse :)

  217. anonymous
    • 5 years ago
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    can you use the order of operations in that?

  218. anonymous
    • 5 years ago
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    :O thats mean lol

  219. amistre64
    • 5 years ago
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    the order of operations are worked backwards if you want to try them, but I never do ;)

  220. amistre64
    • 5 years ago
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    that x wants to be all alone, and the neighbors are over adding to the commotion and eating all the snscks ; so subtract them away (or add) to get rid of them

  221. anonymous
    • 5 years ago
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    so, pemdas would be sadmep lol if you say that out loud it sounds like sad mop

  222. anonymous
    • 5 years ago
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    oooh

  223. amistre64
    • 5 years ago
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    it can be :) lets get rid of the neighbor in this problem, lets send it over to the other side of the street (the equal sign). 3x - 7 = 8 how do we get rid of our -7 neighbor?

  224. anonymous
    • 5 years ago
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    we would have to add 7. so, it would be 3x (-7 + 7 = 0 ) = 8? or somthin like that?

  225. amistre64
    • 5 years ago
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    good :) 3x -7+7 = 8+7 3x = 15 now we have a real close and personal 3 stuck to us, its wanting to cuddle, and talk about our feelings and all that bothersome stuff :) How do we send him away? 3x = 15

  226. anonymous
    • 5 years ago
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    sense we are the only ones veiweing, if u could email me at sarah12_rose@yahoo.com and u could help me if one of us has to go? thanks :)

  227. amistre64
    • 5 years ago
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    id rather keep it to in here, just for precations :)

  228. anonymous
    • 5 years ago
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    what a creepy a 3 XD

  229. anonymous
    • 5 years ago
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    IM NOT A FREAK lol i swear

  230. amistre64
    • 5 years ago
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    lol :)

  231. anonymous
    • 5 years ago
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    wouldnt we have to subtract again? what i dont necasarrily get is how thre isn't really an operation to do there?

  232. amistre64
    • 5 years ago
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    i got about 5 minutes before I have to head to class..... 3x is stuck together by multiplication; its means 3 * x

  233. anonymous
    • 5 years ago
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    ohhh

  234. anonymous
    • 5 years ago
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    well, you can head off to lass. i dont want to keep you... haha

  235. anonymous
    • 5 years ago
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    class*

  236. amistre64
    • 5 years ago
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    but were almost done :) 3x = 15 ..... how to get rid of that pesky 3 ?

  237. anonymous
    • 5 years ago
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    divide?

  238. amistre64
    • 5 years ago
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    divide!! say it what confidence :) yes. 3x/3 = 15/3 1x = 5 x = 5 yay!!

  239. anonymous
    • 5 years ago
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    cool! thank you so much. you have helped a ton

  240. amistre64
    • 5 years ago
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    youre welcome :) to double check ourselves we should plug that x = 5 into our eqution and see if its true: 3x - 7 = 8 3(5) - 7 = 8 15 - 7 = 8 8 = 8 ....its good ;)

  241. amistre64
    • 5 years ago
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    Ciao :)

  242. anonymous
    • 5 years ago
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    the eight-grade dance committee sold 203 tickets last year and 249 tickets this year.what is thet best esimate of the percent increase of the number of tickets sold?

  243. anonymous
    • 5 years ago
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    can you help me

  244. anonymous
    • 5 years ago
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    see ya :)

  245. anonymous
    • 5 years ago
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    the eight-grade dance committee sold 203 tickets last year and 249 tickets this year.what is thet best esimate of the percent increase of the number of tickets sold?

  246. anonymous
    • 5 years ago
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    im sorry i suck at percentiges too... lol

  247. amistre64
    • 5 years ago
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    sara1000; I have to head to class now for a few hours, illl try later ;)

  248. anonymous
    • 5 years ago
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    what class

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