SOLUTION: How far can a man walk into the country at the rate of 4mph if he rides back at the rate of 20 mph and his total time is 8 hours?

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Question 27787: How far can a man walk into the country at the rate of 4mph if he rides back at the rate of 20 mph and his total time is 8 hours?
Answer by Paul(988) About Me  (Show Source):
You can put this solution on YOUR website!
Let the distance be x
x%2F4-x%2F20=8
Multiply the whole equation by 20
20%28x%2F4%29-20%28x%2F20%29=20%288%2F1%29
5x-x=160
4x=160
x=40

Hence, a person can walk for 40 milies.
paul.