SOLUTION: Mr. Jones has $0.70 in dimes and nickels. The total number of coins is 2 more than 3 times the number of nickels. How many coins of each type does he have?
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Question 1126832: Mr. Jones has $0.70 in dimes and nickels. The total number of coins is 2 more than 3 times the number of nickels. How many coins of each type does he have? Answer by ikleyn(52858) (Show Source):
The condition literally means that the number of dimes is TWO times the number of nickels PLUs 2:
D = 2N + 2.
Then the money equations is
5N + 10*(2N + 2) = 70 cents
5N + 20N + 20 = 70
25N = 70-20 = 50
N = 50/25 = 2.
Answer. 2 nickels and 2*2+2 = 6 dimes.
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