SOLUTION: Calvin paid his $1.35 skate rental with dimes and nickels only. There were 19 coins in all. How many of each coin were there?
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Question 125067: Calvin paid his $1.35 skate rental with dimes and nickels only. There were 19 coins in all. How many of each coin were there? Answer by checkley71(8403) (Show Source):
You can put this solution on YOUR website! N+D=19 N=19-D
.10D+.05(19-D)=1.35
.10D+.95-.05D=1.35
.05D=1.35-.95
.05D=.40
D=.40/.05
D=8 DIMES.
19-8=11 NICKELS.
PROOF
.10*8+.05*11=1.35
.80+.55=1.35
1.35=1.35
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