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14 March, 07:52

Kevin has a jar containing 63 coins, all of which are either quarters or nickels. the total value of the coins is $12.55. how much of each type of coins do they have

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  1. 14 March, 09:06
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    X+y=63

    .05x+.25y=12.55

    x=63-y

    .05 (63-y) +.25y=12.55

    3.15-.05y+.25y=12.55

    .20y+3.15=12.55

    .20y=9.4

    y=47

    47 quarters and 16 nickels
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