The container that holds the water for the football team is 2/5 full. After pouring in 8 gallons of water, it is 2/3 full. How many gallons can the container hold?

Question

flashp · Answer

2/5 of 30 = 60/5 = 12.  Add 8 gallons to 12 and we have 20.  2/3 of 30 = 60/3 = 20 which means you answer would be 30

alekos · Answer

But how did you get 30 in the first place?  Just a wild guess?

alekos · Answer

Using algebra

2x/5 + 8 = 2x/3

where x is the volume of the container

Solve for x