Mathematics, 18.03.2021 03:20 banna01man

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.

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