SOLUTION: Charles has $2.75 in dimes and nickles. The number of nickles is one less than twice the number of dimes.How many of each type of coin does he have?

Question 819781: Charles has $2.75 in dimes and nickles. The number of nickles is one less than twice the number of dimes.How many of each type of coin does he have?
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
5n + 10d = 275
n = 2d - 1
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5n + 10d = 275
5(2d - 1) + 10d = 275
10d - 5 + 10d = 275
20d = 280
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d = 14
n = 27
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