Question

Tim's bank contains quarters, dimes, and nickels. he has 3 more dimes than quarters and 9 fewer nickels than quarters. if he has 84 coins, write and solve an equation to find how many quarters tim has.

Answer 1

t = 84
t = x + (x + 3) + (x - 9)
x + (x + 3) + (x - 9) = 84
x + x + x + 3 - 9 = 84
3x - 6 = 84
3x - 6 + 6 = 84 + 6
3x = 90
3x/3 = 90/3
x = 30