Homework Help: intermediate algebra

Posted by Denise on Thursday, September 27, 2007 at 9:56pm.

A business executive bought 40 stamps for $13.68. The purchase included 37 cents stamps and 23 cents stamps. How many of each type of stamp were bought?

intermediate algebra - drwls, Thursday, September 27, 2007 at 10:13pm
x + y = 40 (number of stamps)
23 x + 37 y = 1368 (number of cents)

Solve for x and y

23 (40 -y) + 37 y = 1368

Now you only have to solve for y

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