Can you please help me with this...

Question

A motorboat travels 252mi in 6 hours going upstream. It travels 336mi going downstream in the same amount of time. What is the rate of the boat in still water and what is the rate of the current?

Answer 1

b + c = 336/6 = 56, d=rt, r=d/t = rate of speed = distance over time

b -c = 252/6 = 42

add

2b = 98

b = 49 mph in still water

subtract

2c = 14

c = 7 mph = current speed