Question 1008468
n = number of nickels
d = number of dimes
q = number of quarters


d = 2n
q = 5n
5n + 10d + 25q = 300


Write everything in terms of n.


5n + 10d + 25q = 300
5n + 10(2n) + 25(5n) = 300
150n = 300
n = 2


Ruth has 2 nickels, 4 dimes, and 10 quarters.