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Mathematics, 22.06.2019 07:30 julliette27

The library sells 376 books at its annual used-book sale. the sale takes in a total of $2119. children's books cost $4, and adult books cost $7. let x = number of children's books sold, and let y = the number of adult books sold. which system of equations can the librarians use to model this situation?

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The library sells 376 books at its annual used-book sale. the sale takes in a total of $2119. childr...
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