SOLUTION: a donation box contains 30 coins consisting of nickels, dimes, and quaters. the number of dimes is 4 more than twice the number of quaters. if the total value of coins is $2.60, ho

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Question 228355: a donation box contains 30 coins consisting of nickels, dimes, and quaters. the number of dimes is 4 more than twice the number of quaters. if the total value of coins is $2.60, how much coins of each type are there?
Answer by Edwin McCravy(20056) About Me  (Show Source):
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a donation box contains 30 coins consisting of nickels, dimes, and quaters. the number of dimes is 4 more than twice the number of quaters. if the total value of coins is $2.60, how much coins of each type are there?
system%28N+%2B+D+%2B+Q+=+30%2C%0D%0AD+=+2Q%2B4%2C%0D%0A.05N+%2B+.10D%2B.25Q+=+2.60%29

Solve that system and get

N=17, D=10, Q=3

Edwin