1. Joy has 3 times as many dimes as nickels. In all she has $1.40, how many coins of each type does she have?
2. Vicki has $2.80 in quarters and dimes. The number of dimes is 7 less than the number of quarters. Find the number she has of each kind.
3. A purse containing $3.20 in quarters and dimes has, in all, 20 coins. Find the number of each kind of coin.

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