Mathematics, 21.09.2019 17:30, badaxz

Sophia bought 2 pens, a book and a bag from a bookstore. the book cost 3 times as much as the pen and the bag cost $15 more than the book. she spent $175 altogether. what was the cost of the book?

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Sophia bought 2 pens, a book and a bag from a bookstore. the book cost 3 times as much as the pen an...