A water tank can be filled using pipe A, pipe B, or both pipes. It takes pipe A twice as long as pipe B to fill the tank when working alone. When both pipes are working, it takes only 8 hours. This expression represents the situation.
8/2x + 8/x
Which expression also represents this situation?
O (x+2)/2x
O 16/3x
O (4(x+2))/x
O 12/x