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30 May, 14:23

Peter says, "If you subtract 14 from my number and multiply the difference by - 6, the result is - 150." What is Peter's number?

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  1. 30 May, 14:31
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    (n-14) * (-6) = -150

    distribute

    -6*n - 14*-6 = - 150

    -6n + 84 = - 150

    subtract 84 from each side

    -6n + 84-84 = - 150-84

    -6n = - 234

    divide by - 6

    -6n/-6 = - 234/-6

    n = 39

    Peter's number is 39
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