SOLUTION: Matthew has 50 coins consisting of nickels, dimes, and quarters in his coin box. The total value of the coins is $5.70. There are twice as many nickels as there are quarters, find

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Question 1101133: Matthew has 50 coins consisting of nickels, dimes, and quarters in his coin box. The total value of the coins is $5.70. There are twice as many nickels as there are quarters, find how many of each coin he has in his coin box?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
system%28n%2Bd%2Bq=50%2C5n%2B10d%2B25q=570%2Cn=2q%29


system%28n%2Bd%2Bq=50%2Cn%2B2d%2B5q=114%2Cn=2q%29

system%282q%2Bd%2Bq=50%2C2q%2B2d%2B5q=114%29

system%28d%2B3q=50%2C2d%2B7q=114%29

system%282d%2B6q=100%2C2d%2B7q=114%29-------easy to eliminate the d.
highlight%28q=14%29-------fourteen quarters.

Use that to find n and d.