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22 December, 15:22

Twice the sum of a number and six decreased by fifteen is the same as eighteen more than the product of five and the number. Find the number.

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  1. 22 December, 17:09
    0
    -9

    Step-by-step explanation:

    2 (n+6) - 15 = 5n+18

    2n + 12 - 15 = 5n + 18

    2n - 3 = 5n + 18

    2n = 5n + 21

    -3n = 21

    n = - 9
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