`text{ta có}`
`(x+2)/(3-x)=3/7`
`=> 3(3-x)=7(x+2)`
`=> 9-3x = 7x+ 14`
`=> -3x-7x = 14 -9`
`=> -10x = 5`
`=> x =5/(-10)`
`=> x= (-1)/2`
$\\$
`(x+2)/(3-x) = 3/7 (x \ne 3)`
`-> (x+2) . 7 = (3-x) . 3`
`-> 7x +14 = -3x + 9`
`-> 7x + 3x = -14+9`
`-> 10x = -5`
`->x=-5:10`
`->x=(-1)/2` (Thỏa mãn)
Vậy `x=(-1)/2`
Giải giúp mình với ạ mình cần gấp á
Exercise 5 : Rewrite the sentences without changing the meaning 1. Huyen My sings beautifully. Her sister sings more beautifully than her. (AS ... AS) ............................................................................................................. 2. The new sculpture is 4 metres high. The old sculpture is 4.2 metres high. (AS ... AS) .................................................................................................................................... 3. I usually stayed up late to watch football matches last year, but now I don’t. → I used...................................................................................................................... 4. There were some trees in the field, but now there aren’t any. → There used .............................................................................................................. 5. They have very little money. They are happy. (in spite of) .................................................................................................................................... 6. My foot was injured. I managed to walk to the nearest village. (although) .................................................................................................................................... 7. Do you enjoy listening to music? -> Are …………………….…………………………… 8. The blue dress is cheaper than the red one. The red dress isn’t ……………………………………… 9. Mr. Hai usually has stomach problems. He eats dinner very close to the bedtime. (so) ……………………………………………………………………………………… 10. My dad has a lot of carved eggs. He has never sold any of them. (but) ……………………………………………………………………………………………… 11. I am interested in watching TV in the evening .-> I enjoy… …………………………………………………………………………………. 12. Titanic is a really good movie. It is not for anyone under the age of sixteen. (However) ………………………………………………………………………………………
từ sau chiến tranh thế giới thứ 2 tình hình các nước tây âu đã có những thay dổi to lớn và sâu sắc ntn?
Cho tam giác ABC có góc A bằng 70 độ, AB=6 cm, AC=10 cm. tính diện tích ABC. giúp mình với ạ
a) Where's Ha Noi? - It's in north Viet Nam. b) Where's Ha Long Bay? - It's in north Viet Nam. c) Where's Hue? - It's in central Viet Nam. d) Where's Ho Chi Minh City? - It's in south Viet Nam. Dịch
B4: 2. My brother has got a moped, but he wants to get a ______________now. 3.When we moved to a new house last summer, we needed two___________for our furniture. 4. The police use special ____________to follow criminals from the air. 5. I don't like going to school on the _______ because you can't see outside. B5: 1 The water bottle is nearly empty. There __________________in the bottle. 2. It's not a good idea to eat a lot of sugar You______________________a lot of sugar. 3. Anna's dad isn't a very careful driver. Anna's dad ________________________________. 4. J K Rowling wrote the Harry Potter books. The Harry Potter books______________________J K Rowling. 5. Alexander Graham Bell invented the telephone. The_________________________ the telephone was Alexander Graham Bell.
Viết đoạn văn khoảng 10 -12 câu cảm nhận về chân dung Thúy Vân. Kiểu đoạn Tổng phân hợp, trong đoạn có sử dụng một câu cảm thán và một phép liên kết, gạch chân chỉ rõ
Viết một bức thư cho người bạn của bạn để nói với người đó về kì nghỉ Tết ( bằng tiếng việt với lại TB thôi đừng dài quá nhen. Cảm ơn mấy bạn!)
Exercsie 4 : Make questions for the underline words 1. Sarah left two hours ago. ......................................................................................................................... 2. She is watching Tom and Terry. ......................................................................................................................... 3. I felt terrified before my last Maths test. ......................................................................................................................... 4. It is 10 kilometers from here to ACB bank. ......................................................................................................................... 5. I have known Marie for nine years. ......................................................................................................................... 6. We should use biogas for cooking instead of gas. ......................................................................................................................... 7. Nuclear power can’t be used popularly because it is dangerous. ......................................................................................................................... 8. Yaly Hydropower Plant was constructed in 1993. ......................................................................................................................... 9. There are seven types of renewable energy. ......................................................................................................................... 10. Vietnamese people go to pagodas at Tet to pray for a year of good luck and happiness. .........................................................................................................................
Trình bày phương pháp giải quyết mâu thuẫn bằng kết hợp các mặt đối lập.
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