phải cùng chia hai vế cho $9$ bạn nhé :
$9x=-63$
$=9x:9=-63:9$
$⇒x=-7$
$2$ vế chia cho $9$
$⇒9x÷9=-63÷9$
11- (Be)..................... It hot last week? 12- The windows (be)....................... open last Monday. 13- (Be)................. you a teacher two years ago? Yes, I (be)................. 14- Where (be).................... Nam from yesterday? 15- Why (be)............................ he unhappy last Tuesday? 16. I (remember)........................ your trip to Nha Trang two years ago. 17. Ba (wear)............................. the cap all day yesterday. 18. I (eat).......................... a lot of fish yesterday. 19. Her aunt (take)................................... her to see Cham Temple last year. 20. Tuan (have).............................. a new bike yesterday. 21. She (not buy).................................. a new ruler yesterday. 22. He (not talk).......................... with his parents about his vacation in Da Lat last year. 23. They (not come).................................. school yesterday? 24. The windows (not close)............................ yesterday? 25. We (not return)...................................... at home at 7 pm last Monday. 26. She (not eat)............................................. fish and crab yesterday. 27. Lan (not go)................................. Ho Chi Minh city two years ago. 28. My parents (not take)................................. to Vung Tau last week. 29. We (not have)...................................... a lot of friends in Ha Noi. 30. Lan and Hoa (be).................................... your school two years ago? 31. What they (play)............................... last week? 32. What Hoa (try)...................................................... on yesterday? 33. Who (talk).................................... to about the film on TV last Monday? 34. Where they (stop)..................................... on their way back last Sunday? 35. What the student (wear)...................................... at school two years ago? 36. Where you (put) the cake yesterday? 37. What time you (leave).................................. home for school yesterday? 38. What Ba(receive)................................. from Liz last week? 39. How long he (do)............................ this hat yesterday? 40. What time you (go)................................... to bed last night? 41. You (go)................................... to Dalat for last tet vacation/ 42. He (have)................................... a lot of friends in Ho Chi Minh city 3 years ago? 43. His uncle (take)............................. him to see Tri Nguyen aquarium last week? 44. Liz (buy)........................... a lot of souvenirs yesterday? 45. They (put)........................... the fish in the big bag last Sunda Bài 1: Cho dạng đúng của động từ trong ngoặc. 1. They (come) …………….. back home after they (finish) ………………… their work. 2. She said that she ( meet) ……………………. Mr. Bean before. 3. Before he (go) ………………………….. to bed, he (read) ………………………… a novel. 4. He told me he (not/wear) ………………………… such kind of clothes before. 5. When I came to the stadium, the match (start) …………………………………. 6. Before she (listen) ………………….. to music, she (do)……………………. homework. 7. Last night, Peter (go) ………………….. to the supermarket before he (go) ………………… home. Bài 2: Viết lại câu sao cho nghĩa không đổi sử dụng từ gợi ý cho sẵn. 1. David had gone home before we arrived. – After ……………………………………………………………………………………. 2. We had lunch then we took a look around the shops. – Before …………………………………………………………………………………… 3. The light had gone out before we got out of the office. – When……………………………………………………………………………………. 4. After she had explained everything clearly, we started our work. – By the time ……………………………………………………………………………. 5. My father had watered all the plants in the garden by the time my mother came home. – Before ……………………………………………………………………………… Bài 1: Cho dạng đúng của động từ trong ngoặc. 1. They (come) …………….. back home after they (finish) ………………… their work. 2. She said that she ( meet) ……………………. Mr. Bean before. 3. Before he (go) ………………………….. to bed, he (read) ………………………… a novel. 4. He told me he (not/wear) ………………………… such kind of clothes before. 5. When I came to the stadium, the match (start) …………………………………. 6. Before she (listen) ………………….. to music, she (do)……………………. homework. 7. Last night, Peter (go) ………………….. to the supermarket before he (go) ………………… home. Bài 2: Viết lại câu sao cho nghĩa không đổi sử dụng từ gợi ý cho sẵn. 1. David had gone home before we arrived. – After ……………………………………………………………………………………. 2. We had lunch then we took a look around the shops. – Before …………………………………………………………………………………… 3. The light had gone out before we got out of the office. – When……………………………………………………………………………………. 4. After she had explained everything clearly, we started our work. – By the time ……………………………………………………………………………. 5. My father had watered all the plants in the garden by the time my mother came home. – Before ………………………………………………………………………………
em cảm ơn nhiều ạ các ac em hưa sẽ vote 5sao và thanks ạ
Giải giúp e vs ạ . Giải hệ pt bằng pp thế : {X+y=140 {X-x/8=y+×/8
Cho góc xOy = 1000, vẽ góc yOz kề bù với góc xOy. Gọi Ot là tia phân giác của góc xOy, Ot' là tia phân giác của góc yOz. 1/ Vẽ hình, kể tên các cặp góc kề bù trong hình vẽ. 2/ Tính số đo góc tOt'.
Làm giúp mình câu 10 với ạ! Quan trọng là cho mình biết trạng ngữ đó bổ sung ý nghĩa gì thôi nhé! Làm đúng nha,60 điểm đó!
Ai biết bài này bày cho mình với ạ
Câu 1: tính 68 + 11 × 305 68 × 11 + 305 68 × 11 ×305 Câu 2: một căn phòng hình chữ nhật có chiều dài 24m, chiều rộng 5m. Tính chu vi và diện tích căn phòng đó?
giải cho e với ạ chỉ cần câu d,e thôi ạ
Cầu xin mn giải giúp e mỗi cái bài số hai này thôi ạ, xin chân thành cảm ơn
Cho 18,6gam hỗn hợp gồm sắt và kẽm tác dụng với dd HCl dư thu được 6,72lit khí H2 (đktc), tính khối lượng mỗi kim loại trong hỗn hợp.
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