Question
In a book shop, a box of pens costs twice as much as a guidebook. Mrs Chia spent 18 of her money to buy 2 boxes of pens. She then spent 79 of her remaining money to buy some guidebooks and had $22.40 left. How much does each guidebook cost?
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In a book shop, a box of pens costs twice as much as a guidebook. Mrs Chia spent 18 of her money to buy 2 boxes of pens. She then spent 79 of her remaining money to buy some guidebooks and had $22.40 left. How much does each guidebook cost?