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20 September, 08:05

What is the answer 12x-9-3x=72

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  1. 20 September, 10:21
    0
    12x-9-3x=72

    9x-9=72

    9x-9+9=72+9

    9x=81

    9x/9=81/9

    x=9
  2. 20 September, 11:56
    0
    Work:

    12x-9-3x=72

    combine like terms: 12x + (-3x)

    9x-9=72

    add 9 to both sides

    9x=81

    divide by 9 on both sides

    x=9

    Answer:

    x=9
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