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

1/2 = 3/6 - 1/6 = 2/6 = 1/3 of container is filled with 7 gallons
to fill a container 3 x 7 = 21 gallons

Answer 2

find change
1/6 to 1/2
1/2 times3/3=3/6
1/6 to 3/6
change of 2/6=1/3

1/3 of all =7
times 3 both sides
all=21

container holds 21 gallons