Найдите значания выражений​

Anna: Hello, is that you, Mary? How are you? Why yesterday did not go to class?
Mary: Hi Anna. I felt bad. And couldn't even get up.
A: What happened to you?
M: I don't know. I haven't went to the doctor. I had a high temperature.
A: can you go to institute today?
M: I'm Afraid not. This morning I visit the doctor. I feel that I have a few days to stay in bed. Really sorry we have to miss lectures.
A: Nothing to worry about. Don't have to come if you don't feel. Of course, you need to stay in bed. If you want to borrow my notes. Can I visit you today?
M: Of Course. Come immediately after lessons.
A: I'm Sorry, but after school I have to go to the library to get some books for discussion.
M: don't go to the library. I have many interesting books. You can take any of them.
A: Well. I can come to you on the 41 tram?
M: Yes. But don't come on the tram. Near my house opened a new metro station and takes me all of fifteen minutes to reach the Institute by metro.
A: Very well, but I have to go to College. Yet.
M: see you Then. Don't forget to bring me your notes. Give me a call if you can't come.

                                                                          -----                             
                                                                                |
I - ?, но на 2 ученика меньше чем во втором  |  52 ученика
II - ?                                                                         | 
                                                                          ----- 

Решение:

1) 52 - 2 = 50 (уч) - если бы было поровну
2) 50 : 2 = 25 (уч) - в первом классе
3) 25 + 2 = 27 (уч) - во втором классе

ответ: 25 и 27