Going against the current, a boat takes 6 hours to make a 120-mile trip. When the boat travels with the current on the
return trip, it takes 5 hours.
If x= the rate of the boat in still water and y= the rate of the current, which of the following systems could be used to
solve the problem?
6x - 5y = 120 and x+y=120
6(x-y)=120 and 5(x + y) = 120
6(x + y) = 120 and 5(x - y) = 120