Mathematics, 10.12.2020 23:00 MileenaKitana

during a 15-minute flash sale at a bookstore, 27 books were purchased for a total of $219.. new books cost $12, and used books cost $5. how many used books were sold?

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during a 15-minute flash sale at a bookstore, 27 books were purchased for a total of $219.. new book...

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