Question
It takes Machine T and Machine B 10 minutes to print a total of 470 copies of brochures. Machine T can print 21 copies of brochures in one minute. How many copies of brochures can Machine U print per minute?
2 m

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It takes Machine T and Machine B 10 minutes to print a total of 470 copies of brochures. Machine T can print 21 copies of brochures in one minute. How many copies of brochures can Machine U print per minute?