Sarah has a collection of nickels, dimes, and quarters worth $9.25. She has 10 more dimes than nickels and twice as many quarters as dimes. How many coins of each kind does she have?

Answer 1

nickels --- x
dimes ---- x+10
quarters --- 2(x+10) = 2x + 20

now for the value of your coints

5x + 10(x+10) + 25(2x + 20) = 925

solve for x , easy to solve