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Mathematics, 28.01.2021 17:40 dubouuu

A store sells hardcover books for $8 and paperback books for $5. You buy 9 books, represented by the equation x + y = 9, where x is the number of hardcover books and y is the number of paperback books. The equation 8x + 5y = 57 represents the total cost. How many of each type of book did you buy?

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A store sells hardcover books for $8 and paperback books for $5. You buy 9 books, represented by the...

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