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13 October, 21:58

3x minus 9 equals 1x plus 12

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Answers (1)
  1. 13 October, 23:33
    0
    x = 21/2

    Step-by-step explanation:

    Move all terms not containing x to the right side of the equation.

    3x=x+21

    Move all terms containing x to the left side of the equation.

    2x=21

    Divide each term by

    2

    and simplify.

    x = 21/2
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