Question 1024175
With the current, you can row 9 miles in 2 hours. Against the current, your return trip takes 6 hours( also 9 miles). Find your average rowing rate in still water and the average rate of the current. 
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Find the 2 speeds, upstream and downstream.
Avg rowing rate is the average of the 2 speeds.
Current is the difference between either direction's and rowing speed.