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14 July, 14:09

what is 7 (x-2) = 4 (x+1) - 21

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  1. 14 July, 14:32
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    7 (x - 2) = 4 (x + 1) - 21

    7 (x) - 7 (2) = 4 (x) + 4 (1) - 21

    7x - 14 = 4x + 4 - 21

    7x - 14 = 4x - 17

    - 4x - 4x

    3x - 14 = - 17

    + 14 + 14

    3x = - 3

    3 3

    x = - 1
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