February 23, 2017

Homework Help: algebra

Posted by Mary on Sunday, March 16, 2008 at 8:04am.

Here's the problem: It takes Stan 20 days to build a house by himself. When his wife, Brenda, joins him, it takes only 14 days. How long does it take Brenda to build a house on her own?

Is there some sort of formula to solve this? I have no idea where to begin. Thanks for the help!

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