tìm cặp số nguyên x,y thỏa mẵn: xy-2x+3y=10

Các câu hỏi liên quan

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions. 5. Paul is a very _______ character, he is never relaxed with strangers. A. self-conscious B. self-satisfied C. self-directed D. self-confident 6. Mary’s lawyer advised her_______ anything further about the accident. A. not saying B. telling C. not to say D. not tell 7. The authorities _______ actions to stop illegal purchase of wild animals and their associated products effectively. However, they didn’t do so. A. must have taken B. had to take C. needed have taken D. should have taken 8. The U23 Vietnamese football team’s performance has garnered _____ from around the world and shown promise for Vietnam’s soccer horizon. A. attentive B. attention C. attend D. attentively 9. This class seems to have only ______ knowledge of what they are supposed to achieve. A. smattering B. rudimentary C. comprehensive D. faded 10. Perhaps men ______ more from heart disease than women because they do not cry enough. A. are sick B. trouble C. suffer D. have 11. It was her _______ powers at the keyboard rather than her age which eventually forced her retirement. A. meteoric B. waning C. slippery D. negative 12. I thought the film would have a(n) _______ finish, but there was a clever twist towards the end. A. thrilling B. appealing C. predictable D. nail-biting 13. Delinquency often results _______ something that happened in the youth’s childhood. A. in B. to C. of D. from 14. ______ you like what I want to do or not, you won’t make me change my mind. A. Because B. Whatever C. If D. When 15. You will have to ______ your holiday if you are too ill to travel. A. put aside B. call off C. back out D. cut down 16. ______ number of boys were swimming in the lake, but I didn’t know ______ exact number of them. A. A/the B. A/an C. The/the D. The/an 17. The problem of finding transport to the outback was ______ by the recent torrential rains. A. exacerbated B. deepened C. sharpened D. fulfilled 18. Meanwhile, as ______ payment, we will send you an invoice before the end of the month. A. regard B. regarded C. regards D. regarding