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If I have 27 coins (dimes and nickels) that total $1.95. How many are dimes and how many are nickels

  • Math -

    D = # of Dimes, N = # of nickels

    D + N = 27, therefore
    D = 27 - N

    .10D + .05N = 1.95

    Substitute 27 - N for D in second equation and solve for N. Put that value in the first equation to find D. To check, put both in the second equation.

    I hope this helps.

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