In a collection of nickels, dimes and quarters, there are twice as many dimes as nickels, and 4 fewer quarters than dimes. The total value of the coins is $5.75.
How many nickels are there in the collection ?
X Nickels.
2x Dimes.
(2X-4) Quarters.
5x + 10*2x + 25(2x-4) = 575 Cents.
Solve for x.