Question
It takes Machine T and Machine B 30 minutes to print a total of 1350 copies of catalogs. Machine T can print 18 copies of catalogs in one minute. How many copies of catalogs can Machine U print per minute?
2 m

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It takes Machine T and Machine B 30 minutes to print a total of 1350 copies of catalogs. Machine T can print 18 copies of catalogs in one minute. How many copies of catalogs can Machine U print per minute?