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2 October, 22:12

Yvonne is thinking of a number. Fifty, decreased by three times the number, is the same as seven times the number, increased by 80. What is Yvonne's number?

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Answers (2)
  1. 3 October, 01:18
    0
    50 - 3x = 7x + 80

    50 = 10x + 80

    -30 = 10x

    x = - 3
  2. 3 October, 01:41
    0
    (50-3) x=7x+80

    50x-3x=7x+80

    47x=7x+80

    -7x - 7x

    40x=80

    40x/40=80/40

    x=2
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