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16 August, 23:37

Toby has 15 coins totaling $2.85. He has only quarters and dimes. How many of each type coin does he have?

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  1. 16 August, 23:57
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    A) D + Q = 15

    B).10 D +.25Q = 2.85

    Multiplying equation A by -.10

    A) -.10 D -.10 Q = - 1.5 Then adding this to B)

    B).10 D +.25Q = 2.85

    .15Q = 1.35

    9 Quarters

    and if there are 15 coins there are 6 dimes
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