It takes three hours for a ship to sail 45 kilometers downstream and five hours against the current. If the speed of the ship in still water is xkm/h,

, the water velocity is ykm/h, then the values of x and y are (14 and 1), because (x+y)*3=45,

(x-y)*5=65, and the simultaneous solution is x= 14 and y= 1. Please adopt!