Question 764347: i have 8 dollars and 70 cents in quarters and dimes and only 42 coins. how many quarters and dimes do i have Answer by lwsshak3(11628) (Show Source):
You can put this solution on YOUR website! i have 8 dollars and 70 cents in quarters and dimes and only 42 coins. how many quarters and dimes do i have
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let x=number of dimes
42-x=number of quarters
..
.10x+.25(42-x)=8.70
.10x+10.5-.25x=8.70
.15x=1.80
x=12
42-x=30
..
number of dimes=12
number of quarters=30
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