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28 August, 14:56

In his pocket, Hamid has $2.95 in dimes and quarters. If there are 16 coins in total, which system represents the number of dimes and quarters that Hamid has?

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  1. 28 August, 15:09
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    X=dimes y=quarters

    0.1x + 0.25y = 2.95

    x+y = 16

    from the second equation, x = 16 - y and thus 0.1 (16-y) + 0.25y = 2.95 = = > y=9. Finally, x + 9 = 16 = = > x=7

    7 dimes, 9 quarters
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