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anonymous

  • one year ago

HelloGoodnight -RECIEVE ONE MEDAL FOR HELPING- QUESTION IN POST

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  1. Nnesha
    • one year ago
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    goodnight. have a nice dreamz

  2. anonymous
    • one year ago
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    \[1/5(X-15)+1/9(X+9)=X+7\]

  3. anonymous
    • one year ago
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    @wolf1728 I don't know how to do this . Do you think you can help me solve it.

  4. wolf1728
    • one year ago
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    I made a better graphic of the problem:

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  5. wolf1728
    • one year ago
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    That becomes 1/(5x -75) + 1/(9X +81) = x + 7

  6. anonymous
    • one year ago
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    Okay so can you tell me whats the next step

  7. wolf1728
    • one year ago
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    We could multiply both sides by (5x -75) and get 1 + (5x -75) / (9x + 81) = (x +7) * (5x -75)

  8. anonymous
    • one year ago
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    Thats the answer or is that step 1

  9. wolf1728
    • one year ago
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    That's step 1 I'm guessing you have to solve for x right?

  10. anonymous
    • one year ago
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    Okay and yep its solving the equation

  11. anonymous
    • one year ago
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    What's next . Sorry I'm trying to figure out this step

  12. wolf1728
    • one year ago
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    Here's the next step

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  13. anonymous
    • one year ago
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    Okay Can you tell me if 1/13 is the answer. I think I'm doing it right but I'm not sure

  14. wolf1728
    • one year ago
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    I'm working this out as we speak - I don't have the answer yet. I think I've found a quicker way.

  15. anonymous
    • one year ago
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    Okay !

  16. wolf1728
    • one year ago
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    I am trying to find a way to get rid of the "1" or the (5x-75) but something always gets left over

  17. anonymous
    • one year ago
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    Okay let me see too

  18. anonymous
    • one year ago
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    I have the answers but I need to know the steps on how to get them so I can understand it

  19. anonymous
    • one year ago
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    kaun academy bro that will help u

  20. wolf1728
    • one year ago
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    I'd say the next step MIGHT be multiplying 5x^2 -40x -526 by (9x +81) That would produce a cubic equation equaling (5x -75) which would be difficult to solve. Something should be cancelling here.

  21. anonymous
    • one year ago
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    Yes, How'd you get five x squared

  22. anonymous
    • one year ago
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    That's thepart I'm kind of confused by

  23. wolf1728
    • one year ago
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    Look at the second graphic I posted

  24. anonymous
    • one year ago
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    Okay

  25. anonymous
    • one year ago
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    Yeah I still don't get it

  26. wolf1728
    • one year ago
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    That's about as far as I can go I could try using Excel to get the answer (which I'm doing right now) but it won't show you the method

  27. anonymous
    • one year ago
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    Okay that's fine take your time.

  28. anonymous
    • one year ago
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    @ganeshie8

  29. anonymous
    • one year ago
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    @wolf1728 Excel is going to be a link too?

  30. wolf1728
    • one year ago
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    No Excel is just a program for doing calculations and if you know how to program it, you can set it up to do trial and error computations.

  31. anonymous
    • one year ago
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    ohhhh ok

  32. anonymous
    • one year ago
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    http://prntscr.com/8fokd1

  33. Nnesha
    • one year ago
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    facepalm **

  34. anonymous
    • one year ago
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    aha what happen nnesha

  35. Nnesha
    • one year ago
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    so x-5 and x-9 are not at the denominator \[\frac{ x-5 }{ 5} +\frac{ x+9 }{ 9}=x+7\] this is your question right ?

  36. wolf1728
    • one year ago
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    Aha - that second graphic you posted is different than the other one you posted

  37. Nnesha
    • one year ago
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    leftside) find common denominator

  38. anonymous
    • one year ago
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    Ah sorry wolf but to nnesha its 15 so x-15/5

  39. Nnesha
    • one year ago
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    ohh yea sorry 15*

  40. Nnesha
    • one year ago
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    what's the common denominator ?

  41. anonymous
    • one year ago
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    45

  42. Nnesha
    • one year ago
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    yes right \[\frac{ 9(x-15)+5(x+9) }{ 45 }=x+7\] multiply the numerator of 1st fraction by the denominator of 2nd fraction (9(x-15)) multiply the numerator of 2nd fraction with the denominator of 1st fraction (5(x+9) now distribute parentheses by outside number 9(x-15) ="?? 5(x+9)=??? after that combine like terms

  43. anonymous
    • one year ago
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    9+5=14x

  44. Nnesha
    • one year ago
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    oh no no you can't add 5 and 9 first you should distribute x-15 by 9 distributive property ? a(b+c) = a*b + a*c =ab +ac

  45. Nnesha
    • one year ago
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    9(x-15) = 9 times x + 9 times -15 = ?

  46. anonymous
    • one year ago
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    Okay question. How come you switched I thought it was suppose to be 5(x-15)+9(x=9)

  47. anonymous
    • one year ago
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    How come it was switched?

  48. anonymous
    • one year ago
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    sorry *(x+9)

  49. Nnesha
    • one year ago
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    ugh i can't use draw tool >.< well it's like cross multiplication when we find common denominator we should multiply the numerator of `1st` fraction by the denominator of `2nd` fraction |dw:1442104883666:dw|

  50. anonymous
    • one year ago
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    loll okay I don't 100% understand that but I am gonna go with the flow

  51. anonymous
    • one year ago
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    9x-75+5x+40

  52. wolf1728
    • one year ago
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    How about eliminating the denominators and multiply 45 by (x + 7)

  53. anonymous
    • one year ago
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    I thought that 45 was the denominators @wolf1728 and how did you get to this other side of the equation

  54. Nnesha
    • one year ago
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    ah sorry https://www.mathsisfun.com/numbers/common-denominator.html here read this i've to go i hope other users explain this better than meh XD lol good luck! :=)

  55. wolf1728
    • one year ago
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    9* (x-15) + 5*(x+9) = 45 * (x + 7)

  56. anonymous
    • one year ago
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    nooooo stay pls help me finish the problem i get it just not that part @Nnesha

  57. anonymous
    • one year ago
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    Ohh okaya @wolf1728

  58. wolf1728
    • one year ago
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    That help a little HelloGood Morning?

  59. Nnesha
    • one year ago
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    ye but we still have to multiply 9(x-15) + 5(x+9) that's what he didn't understand

  60. wolf1728
    • one year ago
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    okay - I'll finish it up if you want me to.

  61. anonymous
    • one year ago
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    Okay yeah wolf . and yeah thats the part i didnt understand . Go ahead wolf

  62. wolf1728
    • one year ago
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    Okay now we have 9* (x-15) + 5*(x+9) = 45x + 315

  63. wolf1728
    • one year ago
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    You see that right?

  64. anonymous
    • one year ago
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    okay where'd you get 315 from

  65. wolf1728
    • one year ago
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    Multiply 45 * (x + 7) you get 45x + 315 (which is 45*7)

  66. anonymous
    • one year ago
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    okay got that.

  67. wolf1728
    • one year ago
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    Okay so now we do a little multiplying 9* (x-15) + 5*(x+9) = 45x + 315 that equals 9x -135 can you multiply 5*(x +9)?

  68. anonymous
    • one year ago
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    5*x=5x and 5*9=45 5x+45

  69. anonymous
    • one year ago
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    where'd the 135 come from

  70. wolf1728
    • one year ago
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    That's right so we now have 9x -135 + 5x +45 = 45x +315

  71. wolf1728
    • one year ago
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    I multiplied 9 *(x -15)

  72. anonymous
    • one year ago
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    okay

  73. wolf1728
    • one year ago
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    Now we have to collect the terms in this: 9x -135 + 5x +45 = 45x +315

  74. anonymous
    • one year ago
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    okay 9x+5x=14x

  75. wolf1728
    • one year ago
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    So, we have 14x -135 + 45 = 45x + 315

  76. anonymous
    • one year ago
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    yeah so 45x-14x =31x

  77. wolf1728
    • one year ago
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    Very good so we now have -135 + 45 = 31x + 315

  78. anonymous
    • one year ago
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    yay!

  79. wolf1728
    • one year ago
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    There's more to do though

  80. anonymous
    • one year ago
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    -135+45=-90

  81. anonymous
    • one year ago
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    lol yeah sorry i was celebrating

  82. anonymous
    • one year ago
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    -90=31x+315

  83. wolf1728
    • one year ago
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    -90 = 31x + 315

  84. wolf1728
    • one year ago
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    Very good and now?

  85. anonymous
    • one year ago
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    Okay -90+315=225

  86. anonymous
    • one year ago
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    225/-31

  87. wolf1728
    • one year ago
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    No not quite yet. -90 = 31x + 315 Now let's add -315 to both sides

  88. anonymous
    • one year ago
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    oh -90+-315=-405

  89. wolf1728
    • one year ago
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    Right so, -405 = 31x

  90. wolf1728
    • one year ago
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    and then x equals ?

  91. anonymous
    • one year ago
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    okay so x=-405/-31 !

  92. wolf1728
    • one year ago
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    Yes and if we calculate that it equals -13.064516129

  93. anonymous
    • one year ago
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    yossssss

  94. anonymous
    • one year ago
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    You're the greatest

  95. wolf1728
    • one year ago
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    So now you have your answer!

  96. wolf1728
    • one year ago
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    Shucks, thanks :-)

  97. anonymous
    • one year ago
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    loll You're welcome but really Thank you !

  98. wolf1728
    • one year ago
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    you are welcome - glad I stuck it out to get you the answer

  99. anonymous
    • one year ago
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    Yes me too like I really appreciate it, my professor said this is going to be the hardest test of the class so i must know the steps

  100. wolf1728
    • one year ago
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    okay, now at least you know the steps for this problem. Sorry, I started out with the wrong equation.

  101. anonymous
    • one year ago
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    @wolf1728 I'm sorry to bother you but I have one more problem and it's not as hard as the first one i promise. Just need to know these steps . And that's not a problem it was my fault i should've screenshotted it from the jump

  102. wolf1728
    • one year ago
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    Yes the screen shot was MUCH easier to read :-)

  103. anonymous
    • one year ago
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    Agreed!

  104. wolf1728
    • one year ago
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    You have another problem huh?

  105. anonymous
    • one year ago
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    Yeah one more I promise lmao

  106. wolf1728
    • one year ago
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    okay make it easy :-)

  107. anonymous
    • one year ago
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    Okay :)

  108. anonymous
    • one year ago
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    http://prntscr.com/8fp3ct

  109. anonymous
    • one year ago
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    Oh hold one sec I wrote it wrong

  110. wolf1728
    • one year ago
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    Yes it can't have two equal signs

  111. anonymous
    • one year ago
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    Yeah i meant an + haha but lets move this question to a new post i'll tag you

  112. wolf1728
    • one year ago
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    Okay

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