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16 March, 11:18

3/5 (15d+20) - 1/6 (18d-12) = 38

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  1. 16 March, 11:23
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    3/5 (15d+20) - 1/6 (18d-12) = 38

    Simplify

    3/5 (15d+20) - 1/6 (18d-12) = 38

    (3/5) (15d) + (3/5) (20) + - 3d+2=38 (Distribute)

    9d+12+-3d+2=38

    (9d+-3d) + (12+2) = 38 (Combine Like Terms)

    6d+14=38

    Subtract 14 from both sides.

    6d+14-14=38-14

    6d=24

    Divide both sides by 6.

    6d/6 = 24/6

    d=4
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