Question
Cody bought the same number of notebooks and files. The total cost of 5 notebooks and 1 file was $21. The total cost of 1 notebook and 5 files was $33. He spent a total of $72. How many notebooks did Cody buy?
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Cody bought the same number of notebooks and files. The total cost of 5 notebooks and 1 file was $21. The total cost of 1 notebook and 5 files was $33. He spent a total of $72. How many notebooks did Cody buy?