Надо начать с конца, приняв во внимание, что после третьего перехода у крестьянина оказалось ровно 24 копейки, которые он должен был отдать. В самом деле, если после последнего перехода у крестьянина оказалось ровно 24 копейки, то, значит, перед этим переходом у него было 12 копеек. Но эти 12 копеек получились после того, как он отдал 24 копейки, значит, всего денег у него было 36 копеек. Следовательно, второй переход он начал с 18 копейками, а эти 18 копеек получились у него после того, как он в первый раз перешел мост и отдал 24 копейки. Значит, всего после первого перехода у него было денег 18 да 24 копейки, т. е. 42 копейки. ответ: в начале у крестьянина была 21 копейка
At the moment I am а student of a comprehensive school #45. I like my school, but I think it could be better, so I would like to tell you about my ideal school.
My ideal school would be situated in a quiet place near a big park, so that students could walk there after classes to relax. There would be a big buffet, where students could have a cup of tea or coffee with a sandwich during the breaks. My ideal school would also have lockers for books and personal things like in American schools.
Nowadays we have to study a lot of subjects at school. But I think that the most important subjects are those, which will help us to pass the Unified State Exam and to enter the university. In my ideal school the majority of sciences would be given at fact-finding level and students of a high school would be allowed to choose subjects, which they would like to learn on a higher level, according to their aims and preferences. But of course, Russian will be a compulsory subject for everyone at my school, because we must admit that it is necessary for the literate writing. Information technology is another important subject, because computers simplify our lives and each of students will need to use it in future.
As well as the subjects of the curriculum, there would be many after-school clubs, such as chess, drama, music, arts and sports.
To sum up, I think my school would be a place I would like to go to!
1) 57,3-11*х=18,14
39.16-11*x=0
x=39.16/11
x=3.56
2) 17,6:х-2,27=1,73
17.6:x-4=0
x=17.6:4
x=4.4
3) 4,36-5,28:х=1,36
3-5.28:x=0
x=-5.28:(-3)
x=1.76
4) (х+2,67) : 7=0,86
x/7=67/140
x=67/140*7
x=3.35