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7. At a college bookstore, Carla purchased a math textbook and a novel that cost a total of $54, not including tax. If the price

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7. At a college bookstore, Carla purchased a math textbook and a novel that cost a total of $54, not including tax. If the price of the math textbook, m, is $8 more than 3 times the price of the novel, n, which system of linear equations could he used to determine the price of each book?

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