SOLUTION: A purse containing $3.20 in dimes and quarters has, in all, 20 coins. Can you please help me do this problem please, and it also sayd to find the number of each kind of coin.
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Question 230674: A purse containing $3.20 in dimes and quarters has, in all, 20 coins. Can you please help me do this problem please, and it also sayd to find the number of each kind of coin. Answer by rfer(16322) (Show Source):
You can put this solution on YOUR website! d+q=20, d=20-q
.1d+.25q=3.20
.1(20-q)+.25q=3.20
2-.1q+.25q=3.20
.15q=1.20
q=8
q=8=$2.00
d=12=$1.20
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