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Question 12 -3(x+5)=2x-78?

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Question 12 -3(x+5)=2x-78?

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  1. 12 - 3(x + 5) = 2x - 78

    12 - 3x - 15 = 2x - 78

    -3x - 3 = 2x - 78

    78 - 3 = 2x + 3x

    5x = 81

    x = 16.2


  2. 12 -3(x+5)=2x - 78

    Distribute the 3:

    12 - 3x - 15 = 2x - 78

    Bring all numbers to one side and 'x' terms to the other:

    12 - 15 + 78 = 2x + 3x

    Simplify each side:

    75 = 5x

    Isolate x:

    x = 75/5 = 15

  3. -3x-15=2x-78

    78-15=2x+3x

    63=5x

    63/5=x

    x= 12.6

  4. It's 15 ........ Because you distribute the -3 into (x+5). Which is 12-3x-15=2x-78... Then you subtract the -78 to the other side which makes it a positive which is 78-15=63, then you add that 12 to 63 which is 75. Then subtract the 2x which will be -3x-2x. Which is -5x.. So you have -5x+75=0. Then subtract 75 so its -5x=-75. Divide by -5 to -75 which is 15 because you cancel out the negatives and makes a positive.

    Hope this helps..

  5. 12-3x-15=2x-78

    -3x-3=2x-78

    -3x=2x-78+3

    -3x-2x=-75

    -5x=-75

    -x=75/5

    x=15

  6. 12 -3(x+5)=2x-78

    12-3x-15=2x-78

    -3x-3=2x-78

    -3x=2x-78+3

    -3x-2x=-75

    -5x=-75

    5x=75

    x=15

    :))
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