1. There are 48kg of water in two containers. Container A doubles the water in container B, and then container B doubles the remaining water in container A, so the water in the two containers is equal. How many kilograms of water were there in each container at first?

2. Solve inequality X-B.

Suppose: at the beginning, A has X kilograms of water, then B has (48-x) kilograms of water (to avoid confusion between the multiplication symbol and X, the multiplication symbol is replaced by * below) 2 * [x-(48-x)] = 2 * (48-x)-[x-(48-x)] 3 * [x]

2 . x-b & lt； ax+2( 1-a)x & lt； 2+b 1) when 1-a >; 0, that is, a