Question
It takes Machine V and Machine B 30 minutes to print a total of 1680 copies of catalogs. Machine V can print 23 copies of catalogs in one minute. How many copies of catalogs can Machine W print per minute?
2 m

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It takes Machine V and Machine B 30 minutes to print a total of 1680 copies of catalogs. Machine V can print 23 copies of catalogs in one minute. How many copies of catalogs can Machine W print per minute?