SOLUTION: i paid my bill in dimes if i had paid using quarters i would have needed 12 coins less how much was my bill?

Question 951287: i paid my bill in dimes if i had paid using quarters i would have needed 12 coins less how much was my bill?
Answer by nerdybill(7384) (Show Source): You can put this solution on YOUR website!
i paid my bill in dimes if i had paid using quarters i would have needed 12 coins less how much was my bill?
Let n = number of dimes
then
n-12 = number of quarters
.
.10n = .25(n-12)
.10n = .25n-3
3+.10n = .25n
3 = .15n
3/.15 = n
20 = n (number of dimes)
.
answer:
.10(20) = $2.00

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