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anonymous

  • 5 years ago

solve. please show me how you got this.... I am so lost I need step by step help! -15 (3 + x) = -6x -9

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  1. anonymous
    • 5 years ago
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    How far did you get?

  2. anonymous
    • 5 years ago
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    ok first you are goign to distribute the -15 into (3+x) and end up with -45-15 x=-6x-9

  3. anonymous
    • 5 years ago
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    Now we want to get all veribles and constants on oppist sides

  4. anonymous
    • 5 years ago
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    and you end up with 9-45=15x-9x

  5. anonymous
    • 5 years ago
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    simplify you get -36=6x and because we are solving for x we will divide -36 by 6 and end up with x=-6

  6. anonymous
    • 5 years ago
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    I started with -15 * 3 and then -15 * x to get rid of ( ) Thank you so much.... I have a few more probs I am stuck on too if your free....

  7. anonymous
    • 5 years ago
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    I had it started right but didn't know what to do next. That is my problem every time.

  8. anonymous
    • 5 years ago
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    Sure ask away

  9. anonymous
    • 5 years ago
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    2 ( 7x + 5) = 3x -11 (2 - x)

  10. anonymous
    • 5 years ago
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    ok remember first you want to distribute the 2 into (7x+5) and the -11 into the (2-x)

  11. anonymous
    • 5 years ago
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    I got to 14x + 10 = 3x -22 - 11x

  12. anonymous
    • 5 years ago
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    Perfect. Now just get all your x terms on one side, and the non-x terms on the other.

  13. anonymous
    • 5 years ago
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    ok move your simplify both sides

  14. anonymous
    • 5 years ago
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    Oh, except when you multipied the -11 to the -1 it should have be a +11x

  15. anonymous
    • 5 years ago
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    err -11 to the -x rather

  16. anonymous
    • 5 years ago
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    No, the 11 wasn't distributed correctly, the right side should be 3x -22 + 11x.

  17. anonymous
    • 5 years ago
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    so its -11 times - x ??

  18. anonymous
    • 5 years ago
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    Yes.

  19. anonymous
    • 5 years ago
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    You get 14x + 10 = 14x - 22, if you subtract 14x from each side you get 10 = -22, which is false.

  20. anonymous
    • 5 years ago
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    -11(2-x) = -11(2) + (-11)(-x)

  21. anonymous
    • 5 years ago
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    anyone still here?

  22. anonymous
    • 5 years ago
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    I can give it a go

  23. anonymous
    • 5 years ago
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    2 ( 7x + 5) = 3x -11 (2 - x)

  24. anonymous
    • 5 years ago
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    ok the first thing you want to do is to distribute the 2 through (7x+5)

  25. anonymous
    • 5 years ago
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    I think I got it all the way until 14x + 10 = 3x -22 + 11

  26. anonymous
    • 5 years ago
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    You mean 11x. There's an x there too, but everything else is correct

  27. anonymous
    • 5 years ago
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    put an x on your +11

  28. anonymous
    • 5 years ago
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    yes sorry

  29. anonymous
    • 5 years ago
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    now bring the 3x over with the 11x and your number terms to the other side

  30. anonymous
    • 5 years ago
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    then simplify both sides transpose your varibles and constansts and simplify again

  31. anonymous
    • 5 years ago
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    what @ the 14 x on the left?

  32. anonymous
    • 5 years ago
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    when you move things from one side to another, you have to first change the sign of the thing you're moving. the 3x will become negative

  33. anonymous
    • 5 years ago
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    so 14x - 3x + 10 on the left?

  34. anonymous
    • 5 years ago
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    yep. Now you can take the 10 over to the other side in the same way. change the sign, and then you can switch it over to the other side. from there, just add stuff and let me know what you get

  35. anonymous
    • 5 years ago
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    11x=-32 + 11x

  36. anonymous
    • 5 years ago
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    now -11 from both sides?

  37. anonymous
    • 5 years ago
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    yes

  38. anonymous
    • 5 years ago
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    how can I subtract 11x from 11 I thought you could only do like terms?

  39. anonymous
    • 5 years ago
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    you meant to write 11x, remember? now you can subtract 11x from it

  40. anonymous
    • 5 years ago
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    11x - 11x ??

  41. anonymous
    • 5 years ago
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    Yea. the 11x-11x will cancel, leaving you with a false statement

  42. anonymous
    • 5 years ago
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    Yea it's a false statement, kinda a trick problem

  43. anonymous
    • 5 years ago
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    k how @ -10 - 3/7 x = 5

  44. anonymous
    • 5 years ago
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    Start out the same way getting your varibles and constansts on different sides

  45. anonymous
    • 5 years ago
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    you end up with -3/7x=15

  46. anonymous
    • 5 years ago
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    Have you been taught how to cancel out a fraction?

  47. anonymous
    • 5 years ago
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    I don't know all these rules and when to use them confuse me very BAD!!

  48. anonymous
    • 5 years ago
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    if you move something to one side of the = sign,do you have to move something back over to replace it?

  49. anonymous
    • 5 years ago
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    Inorder to cancel out the fraction we are going to multiply 7*-3 then divide by 7 which will leave us with -3x=15*7, which is -3x=105, now divide both sides by -3 and we end up with x=-35

  50. anonymous
    • 5 years ago
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    No just remember whatever you do to one side you have to do to the other.

  51. anonymous
    • 5 years ago
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    so if we have something like 2+x=1 we are going to subtract both sides by 2 which will give us an answer of x=-1

  52. anonymous
    • 5 years ago
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    k that makes sense

  53. anonymous
    • 5 years ago
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    so does -4/13 x = -20 come out to be.... x = -65 ???

  54. anonymous
    • 5 years ago
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    But like we did above we want to cancel out the fraction so we first need to find a lcm for the equation. This is easy to do because we only have one fraction in the problem. So we first multiply the numerator times the lcm then divide the new numerator by the lcm

  55. anonymous
    • 5 years ago
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    but we have to also multiply the other side by the lcm

  56. anonymous
    • 5 years ago
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    I just realized that can't be right.... it would have to be a positive number wouldn't it?

  57. anonymous
    • 5 years ago
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    correct it would be x=65

  58. anonymous
    • 5 years ago
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    okay.... YAY!!!

  59. anonymous
    • 5 years ago
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    how @ x - 4/11 = 3/5 would it be x = 53/55

  60. anonymous
    • 5 years ago
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    or x = 3/5 ??

  61. anonymous
    • 5 years ago
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    53/55 i think.....

  62. anonymous
    • 5 years ago
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    i agree

  63. anonymous
    • 5 years ago
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    okay you are ahuge help. Thank you...

  64. anonymous
    • 5 years ago
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    No problem best of luck to you

  65. anonymous
    • 5 years ago
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    you know anything @ set builder notation???

  66. anonymous
    • 5 years ago
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    Yes

  67. anonymous
    • 5 years ago
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    what would -5x -4 < 3 ( x - 3) be in set builder notation?

  68. anonymous
    • 5 years ago
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    First distribute your 3 like you were before. You want to get some expression for x either greater or less than something else.

  69. anonymous
    • 5 years ago
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    brb, in a few mins

  70. anonymous
    • 5 years ago
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    Ok, back sorry. Did you distribute the 3?

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