Question
Charlie paid $70 for 9 files and 4 markers. The total cost of a file and a marker was $10. Irene bought 7 files and 4 markers. How much did she pay for these items?
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Charlie paid $70 for 9 files and 4 markers. The total cost of a file and a marker was $10. Irene bought 7 files and 4 markers. How much did she pay for these items?