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emily had some books she she traded 12 for magazines and ended up with 7 magazines and 3 books . wha

Mathematics
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emily had some books she she traded 12 for magazines and ended up with 7 magazines and 3 books . what were each of the books worth to where she got 7 magazines and 3 books?

Oct 23rd, 2014

12 magazines = 7 magazines + 3 books  -subtract 7 magazines from each side.

5 magazines = 3 books   -divide each side by 3 to get the variable "books" but itself.

1 book = 5/3 maga

Oct 24th, 2014

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Oct 23rd, 2014
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Oct 23rd, 2014
Dec 5th, 2016
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