SOLUTION: A boy has 34 coins in his pocket consisting of nickels and dimes. If the total value of coins is $2.20, ow many nickels does he have? Sat Prep questions. Thank You.

SOLUTION: A boy has 34 coins in his pocket consisting of nickels and dimes. If the total value of coins is $2.20, ow many nickels does he have? Sat Prep questions. Thank You.

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Question 304829: A boy has 34 coins in his pocket consisting of nickels and dimes. If the total value of coins is $2.20, ow many nickels does he have?
Sat Prep questions.
Thank You.
Answer by checkley77(12844) (Show Source): You can put this solution on YOUR website!
N+D=34 OR N=34-D
.05N+.10D=2.20
.05(34-D)+.10D=2.20
1.70-.05D+.10D=2.20
.05D=2.20-1.70
.05D=.50
D=.50/.05
D=10 DIMES.
N=34-10=24 NICKLES.
PROOF:
.05*24+.10*10=2.20
1.20+1.00=2.20
2.20=2.20
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