DS: 324

a) 60 - 3.(x - 2) = 51

      3.(x - 2) = 60 - 51

      3.(x - 2) = 9

          x - 2  = 9 : 3

          x - 2  = 3

          x       = 3 + 2

          x       = 5

b) 4x - 20 = 2⁵ : 2²

     4x - 20 = 2³

    4x - 20 = 8

    4x       = 8 + 20

    4x       = 28

      x       = 28 : 4

      x       = 7

200 

110

nha bn

k mk nha bn

T H A N K   Y O U

90+10+10+`10+80=200

999+1+100=1100

ok

90 + 10 + 10 + 10 + 80 = ( 90 + 10 ) + ( 80 + 10 + 10 ) = 100 + 100 = 200

999 + 1 + 100 = ( 999 + 1 ) + 100 = 1000 + 100 = 1100

số đầu tiên là : 123456789

ta có quy luật số trước +1 đơn vị = số sau

số thứ 2 là: 987654321

ta có quy luật số trước -1 = số sau

tíc mình nha

1. I haven't smoked for four years.

2. Hardly had my father left the house when my mother appeared.

3. If I were you, I would book a table in advance.

Lớp 3A có 16 bạn nam & 19 bạn nữ

Dear John,

I am writing to tell you how much I enjoyed the few hours I spent with you and your family. I am very grateful for everything you did for me. I found the conversation interesting and I was able to practice my English skills. And I enjoyed the restaurant which is near your house. The food here is very delicious and its service is very good. I would also like to congratulate you on your passing the exam. I want to invite you to my house next week for dinner. Would you please give my best wishes your family ?

I look forward to seeing you.

Yours sincerely,

An