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Going against the current, a boat takes 6 hours to make a 120-mile trip. When...

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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?6(x-yl=120 and 5(x-y)=1206(x+y)-120 and 5(x-y)=1206x-5y=120 and x-y=120

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