Question

The container that holds the water for the football team is 1/6 full. After pouring in 7 gallons of water, it is 1/2 full. How many gallons can the container hold ?

Answer 1

1/6x + 7 = 1/2x
1/6x - 1/2x = -7
1/6x - 3/6x = -7
-2/6x = -7
x = -7 / (-1/3)
x = -7 * -3
x = 21 gallons <=== the container can hold 21 gallons