1. The problem statement, all variables and given/known data A man had a ten gallon keg of wine and a jug. One day, he drew off a jug full of wine and filled up the keg with water. Later on, when the wine and the water had got thoroughly mixed, he drew off another jugful and again filled up the keg with water. The keg then contained equal quantities of water and wine. What was the capacity of the Jug ? 2. Relevant equations Algebra 3. The attempt at a solution Here is what I think should be the correct solution : Let x be the capacity of the jug 10-2x = 2x ∴x= 2.5 Gallons Am I correct ?