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30 September, 13:43

Ryan has some nickels and dimes. altogether, he has 34 coins that total $2.60. write and solve a system of equations to determine how many of each coin he has.

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  1. 30 September, 14:13
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    N+d=34

    .05n+.10d=2.60

    Solve by substitution

    n=34-d

    .05 (34-d) +.10d=2.60

    1.7-.05d+.10d=2.60

    .05d=.90

    d=18 dimes

    18+n=34

    n=16 nickles
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