Question
Will bought the same number of files and pencils. The total cost of 4 files and 1 pencil was $14. The total cost of 1 file and 4 pencils was $26. He spent a total of $72. How many files did Will buy?
4 m

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Will bought the same number of files and pencils. The total cost of 4 files and 1 pencil was $14. The total cost of 1 file and 4 pencils was $26. He spent a total of $72. How many files did Will buy?