at 1st september i went to school at first day of school life. it was rather funny we have little concert at school stadium. i saw a lot of little pupils from 1st grade and adult students from 11th grade. and when i compare my 1st september 5 years ago i remember very colorful holiday it was amazing. and i will remember it for years.
можно подставить числа вместо х и у.например х=-1 у=1
объяснение: 50% на 50%
там ответ а
3 и 2