Mathematics, 30.05.2021 20:20, mtassy85

Last week, Ann bought 9 books and 5 movies for a total of $124. Today, Ann bought 4 books and 21 movies for a total of $318.
Assuming neither item has changed in price, what is the cost of a book in dollars?

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Last week, Ann bought 9 books and 5 movies for a total of $124. Today, Ann bought 4 books and 21 mo...