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Mathematics 8 Online
OpenStudy (anonymous):

A man bought 42 stamps, some 13¢ and some 18¢. How many of each kind did he buy if the cost was $6.66?

OpenStudy (tkhunny):

Rule #1 - Name Stuff. Q1: Name What? A1: What does ti want? Name that. T = # of 13¢ stamps E = # of 18¢ stamps That's about half the problem solution, right there. Now, start translating the problem statement in terms of T and E.

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