Question

The container that holds the water for the football team is1/2 full. After pouring in 9 gallons of water, it is 4/5 full. How many gallons can the container hold?

Answer 1

Well, the problem is that we don't know what fraction (how much of the total) was filled what 9 gallons were poured. We would know this, however, if it started empty and then we filled it.

Answer 2

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Answer 3

Well, what we can do, is subtract the two volumes that were given;