x + 20 + 21 + x + 22 + 23 + x + 24 + 25 + x + 26 + 27 + x + 28 + 29 + x + 30 = 330

6x + (30 + 20) . (30 - 20 + 1) : 2 = 330

6x + 50 . 11 : 2 = 330

6x + 275 = 330

6x = 330 - 275

6x = 55

x = 55 : 6

x = 55/6

\(x+20+21+x+22+23+x+24+25+x+26+27+x+28+29+x+30=330\)

\(\Rightarrow\left(x+x+x+x+x+x\right)+\left(20+21+22+23+24+25+26+27+28+29+30\right)=330\)

\(\Rightarrow6x+\left[\left(30-20\right):1+1\right]\left(20+30\right):2=330\)

\(\Rightarrow6x+11.50:2=330\)

\(\Rightarrow6x+275=330\)

\(\Rightarrow6x=55\)

\(\Rightarrow x=\dfrac{55}{6}\)

x + 20 + 21 + x + 22 + 23 + x + 24 + 25 + x + 26 + 27 + x + 28 + 29 + x + 30 = 330

6x + (30 + 20) . (30 - 20 + 1) : 2 = 330

6x + 50 . 11 : 2 = 330

6x + 275 = 330

6x = 330 - 275

6x = 55

x = 55 : 6

x = 55/6

Cho dạng đúng của động từ trong ngoặc để hoàn thành đoạn văn sau và trả lời câu hỏi

Yesterday (26. be).......was...................Sunday, Nam (27. get).......got...................up at six. He (28. do)……......did...........his morning exercises. He (29. take)……took…...............a shower, (30. comb).....combed....................... his hair, and then he (31. have)…...had......................breakfast with his parents. Nam (32. eat)..............ate...............a bowl of noodles and (33. drink)…………drank…..…….a glass of milk for his breakfast. After breakfast, he (34. help)….....helped.................Mom clean the table. After that, he (35. brush).....brushed..........................his teeth, (36. put)........put....................on clean clothes, and (37. go)..............went..............to his grandparents' house. He (38. have).........had................lunch with his grandparents. He (39. return)………returned……….to his house at three o'clock. He (40. do).........did............his homework. He (41. eat).............ate.........dinner at 6.30. After dinner, his parents (42. take).......took...............him to the movie theater. It (43. be).............was........a very interesting film. They (44. come).............came..............back home at 9.30. Nam (45. go)........went...................to bed at ten o'clock.

46. What day was it yesterday? ...................It was sunday........................................................................................

47. What time did Nam get up? ...................He got up at six.........................................................................................

48. What did he do after breakfast? ......................He helped mom clean the table...............................................................................

49. Who did he have lunch with? ............................He had lunch with his grandparents.............................................................................

50. What timedid he have dinner? ........................he had dinner at 6:30 ...............................................................................

51. What time did Nam go to bed? ......................He went to bed at ten o'clock.................................................................................

Yesterday (26. be) was Sunday, Nam (27. get) got up at six. He (28. do) did his morning exercises. He (29. take) took a shower, (30. comb) combed his hair, and then he (31. have) had breakfast with his parents. Nam (32. eat) ate a bowl of noodles and (33. drink) drank a glass of milk for his breakfast. After breakfast, he (34. help) helped Mom clean the table. After that, he (35. brush) brushed his teeth, (36. put) put on clean clothes, and (37. go) went to his grandparents' house. He (38. have) had lunch with his grandparents. He (39. return) returned to his house at three o'clock. He (40. do) did his homework. He (41. eat) ate dinner at 6.30. After dinner, his parents (42. take) took him to the movie theater. It (43. be) was a very interesting film. They (44. come) came back home at 9.30. Nam (45. go) went to bed at ten o'clock.

46. What day was it yesterday?
=> It was Sunday.

47. What time did Nam get up? 
=> Nam got up at six.
48. What did he do after breakfast?
=> He helped his mom clean the table.

49. Who did he have lunch with?
=> He had lunch with his grandparents.

50. What time did he have dinner?
=> He had dinner at 6.30.

51. What time did Nam go to bed?
=> He went to bed at ten o'clock.

Chữ số thứ 1945 là:

1945-(26-1)x2=3860

                  ĐS

Ta có : 84= 2352 : 28 

=> de 2352 : x > 84

<=> 2352 : x > 2352 : 28 

=> x < 28

=> x=26 hoac x = 27

ủa từ de là từ gì

3 nhé

k cho mk mk đag biij âm

3 chắc chắn lun