Question 1127553
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When a crew rows with the current, it travels
21 miles in 3 hours. 
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Against the current, the crew rows 9 miles in
3 hours. 
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x= the crew's rowing rate in still water and let 
y=the rate of the current. Find the rate of rowing in still water and the rate of the current.
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{{{system(x+y=7,x-y=3)}}}


Use Elimination Method.