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10 October, 16:56

What is 7 (d-2) = 5 (d+2) ?

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  1. 10 October, 19:04
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    Distributive property.

    7*d - 7*2

    7d - 14 = 5*d + 5*2

    7d - 14 = 5d + 10

    -5d - 5d

    2d - 14 = 10

    +14 + 14

    2d = 24

    2d/2 = 24/2

    d = 12
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