Question
In a book shop, a box of pens costs twice as much as a manual. Mrs Chew spent 13 of her money to buy 7 boxes of pens. She then spent 57 of her remaining money to buy some manuals and had $16.80 left. How much does each manual cost?
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In a book shop, a box of pens costs twice as much as a manual. Mrs Chew spent 13 of her money to buy 7 boxes of pens. She then spent 57 of her remaining money to buy some manuals and had $16.80 left. How much does each manual cost?