Question
Some pencils and files were packed into black and silver packets. There were 4 more black packets than silver packets. Each black carton contained 9 pencils and each silver carton contained 12 files. Given that there were 24 fewer pencils than files in total, how much pencils were there?
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Some pencils and files were packed into black and silver packets. There were 4 more black packets than silver packets. Each black carton contained 9 pencils and each silver carton contained 12 files. Given that there were 24 fewer pencils than files in total, how much pencils were there?