Algebra

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Alycia's pggy bank has dimes and quarters in it. The numbers of dimes is four less than three times the number of quarters. If the total value of the coins is $7.85, how many dimes are in the piggy bank?

  • Algebra -

    q = number of quarters
    3q - 4 = number of dimes
    0.25q = value of quarters
    0.10(3q - 4) = value of dimes

    0.25q + 0.10(3q - 4) = 7.85

    Solve for q, number of quarters
    3q - 4 = number of dimes

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