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5 December, 13:07

4|2x+7|=16

x=? and x=?

+3
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  1. 5 December, 13:39
    0
    4 | 2x + 7 | = 16 ... divide both sides by 4

    | 2x + 7 | = 16/4

    | 2x + 7 | = 4

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

    2x = 4 - 7 - 2x - 7 = 4

    2x = - 3 - 2x = 4 + 7

    x = - 3/2 - 2x = 11

    x = - 11/2

    so x = - 3/2 and x = - 11/2
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