Question
It takes Machine K and Machine B 10 minutes to print a total of 690 copies of brochures. Machine K can print 31 copies of brochures in one minute. How many copies of brochures can Machine L print per minute?
2 m

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It takes Machine K and Machine B 10 minutes to print a total of 690 copies of brochures. Machine K can print 31 copies of brochures in one minute. How many copies of brochures can Machine L print per minute?