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31 January, 16:44

15 more than half a number is nine

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  1. 31 January, 17:45
    0
    (1/2) x+15 = 9

    (1/2) x = - 6

    x = - 12
  2. 31 January, 18:31
    0
    15+1/2n=9

    1/2n=9-15 (subtract 15 from both sides)

    1/2n=-6

    n=-6 / (1/2) (divide both sides by 1/2)

    n=-12 (answer)
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