SOLUTION: if you have $3.45 In quarters and dimes, and he has four more quarters than dimes how much does he have of each coin?

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Question 369942: if you have $3.45 In quarters and dimes, and he has four more quarters than dimes how much does he have of each coin?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Let Q be the number of quarters, D dimes.
1.Q=4%2BD
2.25Q%2B10D=345
Substitute eq. 1 into eq. 2,
25%284%2BD%29%2B10D=345
100%2B25D%2B10D=345
35D=245
highlight%28D=7%29
Then from eq. 1,
Q=4%2B7
highlight%28Q=11%29