SOLUTION: 20 stamps were sold for $6.62. Some stamps were 24 cents and some were 37 cents. How many of each stamp were sold?
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Question 159454: 20 stamps were sold for $6.62. Some stamps were 24 cents and some were 37 cents. How many of each stamp were sold? Answer by checkley77(12844) (Show Source):
You can put this solution on YOUR website! X+Y=20 OR X=20-Y
.24X+.37Y=6.62
.24(20-Y)+.37Y=6.62
4.8-.24Y+.37Y=6.62
.13Y=6.62-4.8
.13Y=1.82
Y=1.82/.13
Y=14 37CENT STAMPS WERE SOLD.
20-14=6 24 CENT STAMPS WERE SOLD.
PROOF:
.24*6+.37*14=6.62
1.44+5.18=6.62
6.62=6.62
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