cho a/3=b/5=c/2 và 2a+3b-9c=18. Tìm a,b,c các bạn giúp mình nha, cảm ơn các bạn nhiều :333

Các câu hỏi liên quan

1. Put the verbs brackets in the correct verb form. Kevin O'Donnell works in Hollywood. He records sound for films. He (1. work )____________on his first film in 1980 : Star Wars. He's now 51 and he (2. help )__________to make more than 100 films in 1983, he (3. do )_________the sound on the film called Terms of Endearment. The film ( 4. win )__________five Oscars, but O'Donnell ( 5. not win )_________one. He ( 6. be )_________at the Oscars in 1983 when he was only 26. Now, he ( 7. be )_________to the Oscars 20 times. he has worked on Top Gun, Terminator 3, Spider - Man, Transformers and other great films, but he ( 8. not win )________an Oscar yet. He ( 9. write )_____________20 speeches so far, but ( 10. never given )__________one. The speeches are in a drawer in his house. Kevin doesn't mind. He knows the sound in his films ia amazing. He's going to win - one day ! 2. Rewrite the sentences using " not as.....as". 1. Football is more exciting than rugby. Rugby isn't__________________________________________________________ 2. Indonesia is hotter than Viet Nam. Viet Nam_____________________________________________________________ 3. French is easier than German. German_______________________________________________________________ 4. Anita is friendlier than Alice. Alice___________________________________________________________________ 5. The hotel in london was better than the hotel in Paris. The hotel in Paris_______________________________________________________ 3. Complete the text using the correct comparative form of the adjective or "as.....as" I think Johnny Depp is a ( 1. good )_____________actor than Keanu Reeves. Depp is also in (2. interesting )______________and (3. exciting )____________films than Reeves. In Constantine, for example, Reeves was ( 4. bad )___________than in any other film. I think that Depp was ( 5. good )__________in Finding Never land. Maybe The Secret Window or From Hell were ( 6. thrilling )____________, but they were not (7. interesting )___________Finding Neverland. I think most Hollywood actors are not ( 8. good )_________Johnny Depp.