Mathematics, 02.07.2019 14:00 slrc6130

Aman buys four books from the store and a preferred reader discount card for $20. later that day, he goes back and buys five more books. he also got $5 discount using his new card. if he spent a total of $87 at the bookstore, how much did each book cost assuming every book cost the same amount?

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Aman buys four books from the store and a preferred reader discount card for $20. later that day, he...