Question
It takes Machine J and Machine B 20 minutes to print a total of 820 copies of business cards. Machine J can print 16 copies of business cards in one minute. How many copies of business cards can Machine K print per minute?
2 m

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It takes Machine J and Machine B 20 minutes to print a total of 820 copies of business cards. Machine J can print 16 copies of business cards in one minute. How many copies of business cards can Machine K print per minute?