Question
In a book shop, a box of pens costs thrice as much as a manual. Mrs Thia spent 18 of her money to buy 2 boxes of pens. She then spent 58 of her remaining money to buy some manuals and had $18.90 left. How much does each manual cost?
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In a book shop, a box of pens costs thrice as much as a manual. Mrs Thia spent 18 of her money to buy 2 boxes of pens. She then spent 58 of her remaining money to buy some manuals and had $18.90 left. How much does each manual cost?