Question 736645
john has twice the number of quarters as dimes. the amount of money in$1.80. find the number of dimes
Equations:
q = 2dan 
10d + 25q = 180 cents
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Substitute for "q" and solve for "d":
10d + 25(2d) = 180
10d + 50d = 180
60d = 180
d = 3 (# of dimes)
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Solve for "q":
q = 2d
q = 2*3 = 6 (# of quarters)
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Cheers,
Stan H.
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