Question
Luis paid $79 for 11 files and 6 markers. The total cost of a file and a marker was $9. Mary bought 10 files and 7 markers. How much did she pay for these items?
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Luis paid $79 for 11 files and 6 markers. The total cost of a file and a marker was $9. Mary bought 10 files and 7 markers. How much did she pay for these items?