SOLUTION: Mr.Lawrence has 24 coins with $2.20. The coins are all nickels and dimes. How many of each coin does he have?

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Question 432112: Mr.Lawrence has 24 coins with $2.20. The coins are all nickels and dimes. How many of each coin does he have?
Answer by jorel1380(3719) About Me  (Show Source):
You can put this solution on YOUR website!
n+d=24
5n+10d=220
5n+5d=120
5d=100
d=20
n=4
Mr. Lawrence has 20 dimes and 4 nickles..