Question
Some pencils and pens were packed into black and red bags. There were 11 less red bags than black bags. Each black carton contained 9 pencils and each red carton contained 12 pens. Given that there were 15 more pens than pencils in total, how much pens were there?
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Some pencils and pens were packed into black and red bags. There were 11 less red bags than black bags. Each black carton contained 9 pencils and each red carton contained 12 pens. Given that there were 15 more pens than pencils in total, how much pens were there?