SOLUTION: A mixture of nickels and quarters totals $9.90. There is a total of 50 coins. How many are quarters and how many are nickels?

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Question 1130437: A mixture of nickels and quarters totals $9.90. There is a total of 50 coins. How many are quarters and how many are nickels?
Answer by josgarithmetic(39628) About Me  (Show Source):
You can put this solution on YOUR website!
n+q=50
q=50-n

5n%2B25%2850-n%29=990
5n-25n%2B25%2A50=990
-20n=990-25%2A50
n=13
-
q=37
-
check: 0.05*13+0.25*37=9.9

13 nickels and 37 quarters