Math
posted by angie on .
A gas tank is 1/4 full. Abby adds 4 gallons and now it is 5/8 full. How many gallons does the tank hold?

let the tank hold x gallons
(1/4)x + 4 = (5/8)x
times everybody by 8
2x + 32 = 5x
3x = 32
x = 10 2/3 gallons