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1 March, 20:58

A coat costs $15 more than a dress. Two coats and 4 dresses cost $150. Find the cost of each.

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  1. 1 March, 21:10
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    C = coat

    d = dress

    c = (d + 15)

    d = d

    2 coats = 2 (d + 15)

    4 dresses = 4d

    2 (d + 15) + 4d = 150

    Find d

    2 (d + 15) + 4d = 150

    2d + 30 + 4d = 150

    2d + 4d + 30 = 150

    6d + 30 = 150

    6d = 150 - 30

    6d / 6 = 120 / 6

    d = 20

    Substitute 20 for d in d + 15 to find c

    d + 15

    20 + 15

    35

    c = 35

    coat = $35.00

    dress = $20.00
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