Word Problem

krisolaw

New member
Joined
Jun 5, 2005
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45
Please help with the following word problem. I want to make sure I am doing this right. Thanks in advance.

For her workout, Sarah walks north at the rate of 3 mph and returns at the rate of 4 mph. How many miles does she walk if the round trip takes 3.5 hours?

Here is what I come up with but I am not sure if it is right.

x/3 + x/4 = 3.5
4x + 3x = 42
7x = 42
x = 6

I get 6 miles.
Thanks again.
 
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