Bài 3: Tổng số học sinh của 2 khối lớp 6 và 9 là 300 em. Nếu chuyển 15 học sinh của khối lớp 6 sang khối lớp 9 thì số học sinh của hai khối sẽ bằng nhau. Tìm số học sinh của mỗi khối lớp lúc ban đầu? Các bác giúp em vs !!! ------------------------------------

Các câu hỏi liên quan

1. Julia said that she ___________ there at noon. A. is going to be B. was going to be C. will be D. can be 2. He _______ that he was leaving way that afternoon. A. told me B. told to me C. said me D. says to me 3. She said to me that she __________ to me the Sunday before. A. wrote B. has written C. was writing D. had written 4. I _________ him to sell that old motorbike. A. said to B. suggested C. advised D. recommended 5 My parents reminded me ________ the flowers. A. remember to plant B. plant C. to plant D. planting 6. I asked Martha ______ to enter law school. A. are you planning B. is she planning C. was she planning D. if she was planning 7. Nam wanted to know what time ________. A. does the movie begin B. did the movie begin C. the movie begins D. the movie began 8. I wondered_______ the right thing. A. whether I was doing B. if I am doing C. was I doing D. am I doing 9. The scientist said the earth ________ the sun. A. goes round B. is going around C. went around D. was going around 10. Peter said that if he ________rich, he _________ a lot. A. is – will travel B. were- would travel C. had been – would have travelled D. was – will travel 11. They said that they had been driving through the desert__________. A. the previous day B. yesterday C. the last day D. Sunday previously 12. He asked the children _________too much noise. A. not to make B. not making C. don’t make D. if they don’t make 13. The man said that money ___________ the passport to everything. A. will be B is C. was D. can be 14. The teacher said Columbus _________America in 1492.