Question
Liam bought the same number of files and pencils. The total cost of 3 files and 1 pencil was $10. The total cost of 1 file and 3 pencils was $14. He spent a total of $36. How many files did Liam buy?
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Liam bought the same number of files and pencils. The total cost of 3 files and 1 pencil was $10. The total cost of 1 file and 3 pencils was $14. He spent a total of $36. How many files did Liam buy?