Question
It takes Machine R and Machine B 50 minutes to print a total of 3900 copies of business cards. Machine R can print 38 copies of business cards in one minute. How many copies of business cards can Machine S print per minute?
2 m

Click button first when a symbol is required. X

It takes Machine R and Machine B 50 minutes to print a total of 3900 copies of business cards. Machine R can print 38 copies of business cards in one minute. How many copies of business cards can Machine S print per minute?