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12 August, 19:16

Twice the difference of a number and 4 is equal to three times the sum of the number and 7. find the number.

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  1. 12 August, 20:12
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    2 (x - 4) = 3 (x + 7)

    2x - 8 = 3x + 21

    -21 - 8 = 3x - 2x

    -29 = x <==
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