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A person walks a certain distance and rides back to the starting point in 3 hours. If the person walks both ways, it takes 4 hours. How long does it take to ride both ways?
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Solution: Step 1: Let's denote walking time one way as W and riding time one way as R. Step 2: From the problem, W + R = 3 (riding back). Step 3: Also, 2W = 4, so W = 2 hours. Step 4: Substituting W in the first equation, 2 + R = 3, hence R = 1 hour. Step 5: Time to ride both ways = 2R = 2 * 1 = 2 hours.
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