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December 22, 2014

Homework Help: algebra

Posted by Anonymous on Tuesday, January 17, 2012 at 5:04pm.

An executive bought 300 stamps for $73.80. The purchase included 15 cent stamps, 20 cent stamps, and 40 cent stamps. The number of 20 cent stamps is four times the number of 15 cent stamps. How many 40 cent stamps were purchased?

I need to do this in a chart form and have already set it up but I am lost on what to do next.

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