SOLUTION: john has $1.80 made up of dimes and nickels. he has 3 more than nickels, how many dimes does he have ?

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Question 986602: john has $1.80 made up of dimes and nickels. he has 3 more than nickels, how many dimes does he have ?
Found 2 solutions by Alan3354, macston:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
3 more what?

Answer by macston(5194) About Me  (Show Source):
You can put this solution on YOUR website!
.
N=number of nickels; D=number of dimes
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D=N+3 Three more dimes than nickels.
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$0.05N+$0.10D=$1.80 Convert number of coins to dollar value.
$0.05N+$0.10(N+3)=$1.80
$0.05N+$0.10N+$0.30=$1.80
$0.15N=$1.50
N=10 He has 10 nickels
D=N+3=10+3=13
ANSWER: He has 13 dimes
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CHECK:
$0.05N+$0.10D=$1.80
$0.05(10)+$0.10(13)=$1.80
$0.50+$1.30=$1.80
$1.80=$1.80