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anonymous

  • 5 years ago

please help me understand this. 5(x+7) -2(x-1)=14-(1-9x). This is what I have so far 7x+33=14-(1-9x)

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  1. anonymous
    • 5 years ago
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    You have done 25% of the problem. Now open the parenthesis on the right side by multiplying the terms inside by-1 (change signs in other words).

  2. anonymous
    • 5 years ago
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    5x + 35 - 2x + 1 = 14 - 1 + 9x Did you get this on your first step? This is the distributive property

  3. anonymous
    • 5 years ago
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    Sorry... 5x + 35 - 2x + 2 = 14 - 1 + 9x

  4. anonymous
    • 5 years ago
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    In went across 5x+25 then -2x +1 then combined them which gave me 7x+33. I did know I had to change the signs. When do you know when to do that"?

  5. anonymous
    • 5 years ago
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    5(x + 7) = 5x + 35 -2(x - 1) = -2x + 2 14 = 14 -(1 - 9x) = -1 + 9x Do you get each of these?

  6. anonymous
    • 5 years ago
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    oops it was 5x +35 sorry

  7. anonymous
    • 5 years ago
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    I',m sorry i got the 5+35 then -2x+2 then I changed the signs and changed the signs and alligned which gave me 7x +33=14-(1-9)

  8. anonymous
    • 5 years ago
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    You can do this one of two ways. -(2x - 2) which is -2x + 2 or -2(x - 1) you take -2(x) and -2(-1) which gives you -2x + 2

  9. anonymous
    • 5 years ago
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    So 5x + 35 - 2x + 2 = 3x + 37 because 5x - 2x = 3x 35 + 2 = 37

  10. anonymous
    • 5 years ago
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    I did it another way 5x +35 -2x+2 ( I changed the signs) +2x-2 which gave me 7x+33

  11. anonymous
    • 5 years ago
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    Why would you change the signs? You already used the - when you multiplied.

  12. anonymous
    • 5 years ago
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    I don't know??? okay it's official Im lost. I know the answer is 4, but I've tried several ways to figure it out

  13. anonymous
    • 5 years ago
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    3x + 37 = 14 - 1 + 9x 3x + 37 = 13 + 9x subtract 3x from both sides 37 = 13 + 6x subtract 13 from both sides 24 = 6x divide by 6 on both sides 4 = x

  14. anonymous
    • 5 years ago
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    I see it now!!!!! Thanks for all of your help...

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