Question
In a bookstore, a box of staplers costs thrice as much as a guidebook. Mrs Yang spent 13 of her money to buy 4 boxes of staplers. She then spent 57 of her remaining money to buy some guidebooks and had $19.20 left. How much does each guidebook cost?
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In a bookstore, a box of staplers costs thrice as much as a guidebook. Mrs Yang spent 13 of her money to buy 4 boxes of staplers. She then spent 57 of her remaining money to buy some guidebooks and had $19.20 left. How much does each guidebook cost?