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April 21, 2014

Homework Help: math

Posted by Ted on Tuesday, December 18, 2012 at 11:31pm.

A group of students have volunteered for the student council car wash. Janet can wash a car in m minutes. Rodrigs can wash a car in m-5 minutes, while Nick needs the same amount of time as Janet.If they all work together, they can wash a car in about 3.23 minutes. How long does Janet take to wash a car?

pls help. I tried it couple of times but did not get the answer.

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