1. The problem statement, all variables and given/known data Two pumps of different sizes can empty an entire fuel tank in 4.8 hours. Used alone, the larger pump would empty the tank 4 hours less than would the smaller pump. If using only the smallest pump How long will it take to empty the tank? 2. Relevant equations X = small pump X-4hours = bigger pump Y = 4.8 hours This is what I understand so far. I am not sure what to do next. 3. The attempt at a solution 4.8 = x - 4 would that mean small pump needs 8.8 hours? am I doing this right?