SOLUTION: jeff has $6.45 in quarters + dimes. he has 9 more quarters than dimes. how many coins of each type does he have?

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Question 1076152: jeff has $6.45 in quarters + dimes. he has 9 more quarters than dimes. how many coins of each type does he have?
Answer by jorel1380(3719) About Me  (Show Source):
You can put this solution on YOUR website!
Let d be the number of dimes jeff has. Then quarters are d+9. So:
10d+25(d+9)=645
35d=420
d=12
jeff has 12 dimes and 21 quarters. ☺☺☺☺