42-2=40 (sheets): It means that 2 sheets have been posted, and the rest is the number of sheets to be copied.

5.2+0.7 1*40=33.6 (yuan): It means that the first copy is free of charge, and the rest should be added, so it should be 0.7 1*40.

33.6÷42=0.8 (yuan): This is the average amount of money that everyone will pay in the end. It is correct for two people to add up and divide, which is the average amount of money each of the 42 people has to pay.