ta có

3x-(5-x)=30+(2x-3)

=> 3x-5+x=30+2x-3 (quy tắc phá ngoặc)

=>4x-5=27+2x

=>4x-2x=27+5 (quy tắc chuyển vế)

=>2x=32

=>x=16

Mk thấy bạn Huy giải đúng đó 

thanks

hình bé quá

sin 65⁰=cos 35⁰
\(cos70^0=sin30^0\)
\(tan80^0=cot20^0\)
\(cot68^0=tan32^0\)

Ko nhìn chữ bn ơi, bn cho to hình một tý

Mình có học ở đó nè . Để mình hỏi cô dùm cho ^^ 

cái này phạt vô duyên lắm

bn  thích nhóm của Gaara - Temari - Kankuro à???  @Uyển Nhi Trần

10-(5-x)=30+(2x-3)

10-5+x=30+2x-3

5+x=27+2x

x-2x=27-5

-x=22

x=-22

Cảm ơn bạn Thùy Trang

1 watched

2 locking - was - dropped

4 would finish

5 write - will try - to make

5 left

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III

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Tim Berners-Lee __(1)invented__ the World Wide Web. His first version of the Web was a program named Enquire. At the time, Berners-Lee was __working(2)__ at a laboratory in Geneva, Switzerland. He created the system as a way __that(3)__ sharing scientific information __around(4)__ the world, which uses the Internet, a __(5)world - wide__ network of computers, and hypertext documents. He wrote the __(6)_language_ HTML (Hypertext Mark-up Language), the basic language for the Web, __and(7)__ created URL's (Universal Resources Locators) to designate the location of __each(8)__ web page. HTTP (Hypertext Transfer Protocol) was his set of rules for _linking_(9)__ to pages on the Web. After he wrote the first browser in 1990, thư World Wide Web was up and going. Its __develop(10)__ was phenomenal, and has __changed(11)__ the world. It has made information __more(12)__ accessible than ever before in history.

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