помогите с математикой нужно решить систуму уравнения способом подстановки​

исправьте ошибки                          Misha has two main subjects: Mathematics ahd Russian. They also have Music, Arts, Physical Education ahd Biology. Misha doesn"t like Mathematics.It is difficuit. Music is OK. Misha doesn"t play the piano, but he likes to sing. Misha also likes Russian. It is his favourite subject. History is great. He likes to  read about the old times and interesting people. Misha doesn"t like English. It is not very easy for him. He can"t remember many words. Плиз тупые ответы не пишите сразу удалю даю 83 балла за решение