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OpenStudy (anonymous):
Anna is organizing 40 sheets of red and blue scrapbook paper. She places 15 blue sheets in each of 2 folders. Then she splits the red sheets equally between the 2 folders. Three of these equations can be used to solve for n, the number of red sheets in each folder. Which equation CANNOT? 2n + 15 = 40 2(n + 15) = 40 2n + 30 = 40 n = 5
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