Laverne has sixty-one coins, all of which are dimes and quarters. If the totoal value is $9.85, how many of each kind of coin she has?

1 answer

  1. Let D be the number of dimes and Q be the number of quarters. Use algebra.

    D + Q = 61
    10 D + 25 Q = 985

    Solve that pair of equations.

    10 D + 25 (61 -D) = 985
    15 D = 540
    D = 36
    Q = 61 - 36 = 25

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