`Có:`
`2000 \vdots 2`
`26y \vdots 2`
`→ (2000 - 26y) \vdots 2`
`→ 51x \vdots 2`
`Mà 51 lẻ → x \vdots 2`
Vì x là số nguyên tố `→ x = 2`
`⇒ 51 . 2 + 26y = 2000`
` 102 + 26y = 2000 `
` 26y = 2000 - 102`
` 26y = 1898`
` y = 1898 : 26`
` y = 73`
`Vậy: x = 2; y = 73`
Đáp án:
Giải thích các bước giải:
`51x + 26y=2000`
Ta có:
`26 x ⋮ 2 2000⋮2 ⇒ 51 x ⋮ 2`
Mà 51 và 2 là 2 số nguyên tố cùng nhau nên` x ⋮ 2`
Do đó ta có:` 51 xx 2 + 26 y = 2000 ⇒ y = 73`
Vậy x=2;y=73
Vẽ chipi Line tùy, màu tùy ( miễn sao có tâm, có hồn, phong phú, độc đáo, đặc sắc, đẹp đẽ, xinh đẹp tuyệt vời tý là đc) xincamon;-;
Exercise 1: Choose the word that has the underlined part pronounced differently from the others. 1. A. loved B. stopped C. played D. lived 2. A. laughed B. selected C. liked D. crossed 3. A. crooked B. finished C. arrived D. blessed 4. A. phoned B. enjoyed C. boiled D. cooked 5. A. followed B. fixed C. missed D. talked 6. A. prepared B. allowed C. terminated D. filled 7. A. finished B. committed C. laughed D. worked 8. A. interpreted B. wretched C. dogged D. ordered 9. A. watched B. pushed C. washed D. changed 10.A. purchased B. staved C. cleaned D. arranged Ex 2:Choose the best option to fill in the blank. 1. In 1939, this ..................... was made to tell stories about the real life of Abraham Lincoln as a young man. A. biopic B. science fiction film C. action film D. horror film 2. When watching that ....................., we can’t help laughing at the stupid things of the main actor. A. documentary B. comedy C. action film D. horror film 3. My son feels very happy when he sees that ..................... with a lot of cute animals. A. horror film B. biopic C. thriller film D. animation 4. Most ..................... say that this film is worth watching. A. plots B. settings C. critics D. acting 5. He acts very well. I’m sure that yesterday he stayed up all night reading the ............ A. acting B. character C. survey D. script 6. Before you go to the cinema, you can watch the trailer and read .............. of the film. A. reviews B. disaster C. critic D. character 7. That was a ........ and boring horror film so I slept from the beginning to the end. A. shocking B. entertaining C. gripping D. predictable 8. I didn’t expect the movie to be so interesting and so .....................! I cried at the end of the film. A. moving B. violent C. confusing D. hilarious 9. According to our latest survey, Batman is one of 10 .................... films this summer. A. must-see B. violence C. embarrassed D. stunt 10. Woody Allen is one of some directors who ..................... in their own films and receive positive reviews. A. set B. star C. recommend D. make 11. The film had such a sudden and ..................... ending that no one can imagine. A. disappointed B. must-see C. predictable D. shocking 12. Watching ..................... films may make people more aggressive. A. hilarious B. violent C. entertaining D. gripping
Vẽ Anime nữ Y/C: `@` Full màu. `@` Full line. `@` Đẹp. `@` Không giấy ô-li, giấy có kẻ. `@` Vẽ 2 pic. `@` Digi hay Tradi đều được. `@` Không phạm luật Hoidap247. Lưu ý: Không xin xỏ, cứ yêu cầu mà thực hiện. ________________________________________ P/S: Chào Buổi Sáng!! `@` Bẩu.
tính :C =( 2/3 - 1/4 +5/14 ) :(5/12 +1 - 7/11)
Mong mn giải hộ vì mk đg cần rất gấp ạ
giúp mình với các bạn thân yêu ơi
tìm x A) 2/7-x =-3/4 B)x - 1/2 =-2/3 C) 0,6 + -2/3=3/5 +x D)3x +4/5=2x -5
Giúp mình bài này với ạ, sẽ vote 5s
Chứng minh rằng a/b=c/d thì a^2+b^2 / b^2+c^2 =a/c
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