nhớ tick đúng đó nha

4.(3x-1)-2.(5-3x)=12

<=>12x-4-10+6x=12

<=>18x-14=12

<=>18x=26

<=>x=13/9

Children should go to bed early.

1.What about going to the laboratory ?

2.Ngoc is very interested in Math.

3.They never have time to play the whole game.

4.Teenagers always help the elderly.

Cho dãy các chất sau: (1) glucozơ, (2) metyl fomat, (3) vinyl axetat, (4) axetanđehit. Số chất trong dãy có phản ứng tráng gương là

A. 3

B. 1

C. 4.

D. 2

Of all subjects, I like English best. It is very interesting ang useful. Every day, I study it about one or two hours. I have English on Monday, Thursday and Saturday. In this subject, I learn how to read, write, speak and listen by English.Specially, I can know many new words, many structures and grammar.After lesson, at hoe I usually read a short English story, sing English song and watch some English cartoons.I want to be an English teacher.I love English very much!

Bài 1.Cho góc bẹt aOb.Trên cùng một nửa mặt phẳng bờ ab , ta vẽ hai tia Oc và Ob sao cho góc aOc bằng góc bOd bằng 160 độ.Gọi tia Oe là tia đối của tia Od.

a, CMR góc bOc bằng góc bOe

b, CMR tia Ob là tia phân giác của góc cOe