Question
Rael bought the same number of files and markers. The total cost of 3 files and 1 marker was $22. The total cost of 1 file and 3 markers was $18. He spent a total of $40. How many files did Rael buy?
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Rael bought the same number of files and markers. The total cost of 3 files and 1 marker was $22. The total cost of 1 file and 3 markers was $18. He spent a total of $40. How many files did Rael buy?