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In his motorboat, Bill Ruhberg travels upstream at top speed to his favorite fishing spot, a distance of 120120 mi, in 33 hr.

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The rate of the boat in still water is 44 mph and the rate of the current is 4 mph

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x = the rate of the boat in still water

y = the rate of the current.

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$\frac{120}{3}=x-y\\\Rightarrow 40=x-y$

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$40=44-y\\\Rightarrow 40-44=-y\\\Rightarrow y=4$

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