Đáp án:
x=0 hoặc x=54
Giải thích các bước giải:
x+6/x-6=30/x-30
⇒(x+6)(x-30)=(x-6)×30
⇒x²-24x-180=30x-180
⇒x²-24x-30x=-180+180
⇒x²- 54x=0
⇒x(x-54)=0
⇒x=0 hoặc x=54
Tính thể tích dd NaOH 1M để tác dụng hoàn toàn với 1,121 khí Clo ( đktc) nồng độ mol của các chất sau phản ứng là bao nhiêu ?? Giải hộ e ạ ♡♡
Định nghĩa về truyện dân gian
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To make it easier to use. Thì dùng Wh - question nào?
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Question V: Complete the sentences with although/ in spite of/ because/ because of 1. Although it rained a lot, we enjoyed our holiday. 2. a, ……………………..... all our careful plans, a lot of things went wrong. b, ………………... we'd phoned everything carefully, a lot of things went wrong. 3. a, I went home early ……………….……... I was feeling unwell. b, I went to work the next day………………… .... I was still feeling unwell. 4. a, She only accepted the job ....................................... the salary, which was very high. b, She accepted the job ……………………………….. the salary, which was rather low. 5. a, I managed to get to sleep ………………………... there was a lot of noise. b, I couldn't get to sleep ………………………………...... the noise. Question VI: Make one sentence from two. Use the word(s) in brackets in your sentences. 1. I couldn't sleep. I was very tired. Despite I couldn't sleep despite being vey tired. 2. They have very little money. They are happy. In spite of ................................................................................................................... 3. My foot was injured. I managed to walk to the nearest village. Although .................................................................................................................... 4. I enjoyed the film. The story was silly. In spite of .................................................................................................................. 5. We live in the same street. We hardly ever see each other. Despite ..................................................................................................................... 6. I got very wet in the rain. I was only out for five minutes. Even though .............................................................................................................. Question VII. Rewrite sentences with In spite of / Despite /because / because of 1. Although Tom was a poor student, he studied very well. In spite of __________________________________________ 2. Mary could not go to school because she was sick. Because of _____________________________________________________ 3. Although the weather was bad, she went to school on time. Despite _______________________________________________________________ 4. Because there was a big storm, I stayed at home. Because of ___________________________________________________ 5. In spite of his good salary, Tom gave up his job. Although_______________________________________________________________ 6. He is so young. His acting is excellent. Although_________________________________________________________ 7. The film poster is fascinating. I don't want to see this film. In spite of_______________________________________________________ 8. Although our plan is careful, we made some mistakes. Despite___________________________________________________________
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