Homework Help: Algebra

Posted by Kelvin on Thursday, March 31, 2011 at 11:32am.

a boat moves through still wather at x kilometers(km) per hour. it travels 24km up stream against a current of 2km per hour and then returns with the current. The rate upstream is x-2 because the boat moves against the current and the rate downstream is x+2 because the boat moves with the current

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