Mathematics, 07.05.2020 08:06 dawood2042

ABC bookstore sells packages of books that include both new and used books. New books cost $18 and used books cost $9. The bookstore wants to sell packages that have 36 books total, and the store charges $432 for each package. How many new and used books will each be in the package?

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ABC bookstore sells packages of books that include both new and used books. New books cost $18 and u...