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Math Help - College algebra 2

  1. #1
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    College algebra 2

    Mary has $750.00 in 10 and 25 dollar coins. If she has twice as many 10 dollar coins as 25 dollar coins. What's the number of 10 dollar coins she has?
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  2. #2
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    x = number of $10 coins

    y = number of $25 coins

    Mary has $750.00 in 10 and 25 dollar coins
    10x + 25y = 750

    she has twice as many 10 dollar coins as 25 dollar coins
    2y = x

    solve the system of equations using a method you were taught.
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