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19 September, 18:39

5) What value of x makes this equation true (Show your work) ?

4 (3x - 7) = 36 + 4x

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Answers (2)
  1. 19 September, 21:11
    0
    x = 8

    Step-by-step explanation:

    4 (3x - 7) = 36 + 4x

    12x - 28 = 36 + 4x

    12x - 4x = 36 + 28

    8x = 64

    x = 8

    To control we put x = 8 in the formula 4 (3x-7) = 36 + 4x

    4 (3*8 - 7) = 36 + 4*8

    4 (24-7) = 36 + 32

    4 * 17 = 36 + 32

    68 = 68 So this means x = 8 is correct
  2. 19 September, 22:31
    0
    The answer = 8 and the work goes as the following

    you multiply the 4 outside the brackets by the numbers inside so it becomes:

    12x-28=36+4x

    and then you bring the like terms together

    12x-4x=28+36

    12-4=8 so

    8x=64

    and then you divide by 8 so

    x=64 divided by 8

    x=8
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