SOLUTION: They walk to grandma's house at a rate of 4mi/hr. They ride their bikes back at 8mi/hr. It takes 1 hour longer to walk than to ride. How long did it take to walk?

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Question 924294: They walk to grandma's house at a rate of 4mi/hr. They ride their bikes back at 8mi/hr. It takes 1 hour longer to walk than to ride. How long did it take to walk?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
They walk to grandma's house at a rate of 4mi/hr. They ride their bikes back at 8mi/hr. It takes 1 hour longer to walk than to ride. How long did it take to walk?
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To G'mas DATA:
rate = 4 mph ; time = x hrs ; distance = 4x miles
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From G'mas DATA:
rate = 8 mph ; time = x-1 hrs ; distance = 8x - 8 miles
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Equation::
distance = distance
4x = 8x-8
4x = 8
x = 2 hrs (walking time)
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Cheers,
Stan H.
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