Question
Some files and notebooks were packed into black and green packets. There were 9 more black packets than green packets. Each black carton contained 10 files and each green carton contained 13 notebooks. Given that there were 12 fewer files than notebooks in total, how much files were there?
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Some files and notebooks were packed into black and green packets. There were 9 more black packets than green packets. Each black carton contained 10 files and each green carton contained 13 notebooks. Given that there were 12 fewer files than notebooks in total, how much files were there?