Question
In a store, a box of markers costs thrice as much as a folder. Mrs Fong spent 13 of her money to buy 7 boxes of markers. She then spent 37 of her remaining money to buy some folders and had $38.40 left. How much does each folder cost?
4 m

Click button first when a symbol is required. X

In a store, a box of markers costs thrice as much as a folder. Mrs Fong spent 13 of her money to buy 7 boxes of markers. She then spent 37 of her remaining money to buy some folders and had $38.40 left. How much does each folder cost?