SOLUTION: Rita has a collection of 82 dimes and nickels worth $6.65. How many nickels does she have?

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Question 1005405: Rita has a collection of 82 dimes and nickels worth $6.65. How many nickels does she have?
Answer by macston(5194) About Me  (Show Source):
You can put this solution on YOUR website!
.
N=number of nickels; D=number of dimes
N+D=82
D=82-N
.
$0.05N+$0.10D=$6.65
$0.05N+$0.10(82-N)=$6.65
$0.05N+$8.20-$0.10N=$6.65
-$0.05N=-$1.55
N=31
ANSWER: She had 31 nickels.