Question
It takes Machine P and Machine B 10 minutes to print a total of 460 copies of catalogs. Machine P can print 19 copies of catalogs in one minute. How many copies of catalogs can Machine Q print per minute?
2 m

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It takes Machine P and Machine B 10 minutes to print a total of 460 copies of catalogs. Machine P can print 19 copies of catalogs in one minute. How many copies of catalogs can Machine Q print per minute?