11 x X - 11 x 6 = 4 x X + 11

 11 x x - 66 = 4 x X + 11

 11 x X - 4 x X = 66 + 11

 11 x X - 4 x X = 77

 ( 11 - 4 ) x X = 77

 7 x X = 77

 X = 77 : 7

 X = 11

P/s : k mình nha !

côn chúa mắt tím quá chuẩn luôn bạn ơi cho 1 tick nè 

a) x=24/35 -2/7

x=14/35

b) x=7/8+5/6

x=41/24

c) x-11/5=3/5

x=11/5+3/5

x=14/5

tick cho mình nhé

giúp mình với ạ, mình sẽ tick

=>2(x-6)^2=60

=>(x-6)^2=30

=>\(\left[{}\begin{matrix}x-6=\sqrt{30}\\x-6=-\sqrt{30}\end{matrix}\right.\Leftrightarrow x=\pm\sqrt{30}+6\)

anh ơi, lớp 6 chưa học căn bậc 2 số học ạ.

\(\dfrac{1}{3}+\dfrac{5}{6}\cdot\left(x-\dfrac{11}{5}\right)=\dfrac{3}{4}\)

\(\dfrac{5}{6}\cdot\left(x-\dfrac{11}{5}\right)=\dfrac{3}{4}-\dfrac{1}{3}\)

\(\dfrac{5}{6}\cdot\left(x-\dfrac{11}{5}\right)=\dfrac{5}{12}\)

\(x-\dfrac{11}{5}=\dfrac{5}{12}\cdot\dfrac{6}{5}\)

\(x-\dfrac{11}{5}=\dfrac{1}{2}\)

\(x=\dfrac{1}{2}+\dfrac{11}{5}\)

\(x=\dfrac{27}{10}\)

\(\dfrac{5}{6}\left(x-\dfrac{11}{5}\right)=\dfrac{3}{4}-\dfrac{1}{3}\)

\(\dfrac{5}{6}\left(x-\dfrac{11}{5}\right)=\dfrac{5}{12}\)

\(x-\dfrac{11}{5}=\dfrac{5}{12}:\dfrac{5}{6}\)

\(x-\dfrac{11}{5}=\dfrac{1}{2}\)

\(x=\dfrac{1}{2}+\dfrac{11}{5}=\dfrac{27}{10}\)

x=0,chi tiết liên hệ giáo viên

|x - 1| - x + 1 = 0

=> |x - 1| = x - 1

Xét 2 trường hợp:

+) x - 1 = x - 1 => 0x = 0 => có vô số nghiệm

+) x - 1 = 1 - x => 2x = 2 => x = 1

\(x\in\left\{-1;2\right\}\)

\(\left[{}\begin{matrix}x+1=0\\6-3x=0\end{matrix}\right.\)
\(\left[{}\begin{matrix}x=\left(-1\right)\\x=2\end{matrix}\right.\)

Vì n+(-n)=0 nên ta có:

12+11+10+..............+x=12

=>12+(11+10+..+x)=12

=>11+10+...............+x=0

=>x=-11( vì -11+11=0 sau đó 10+-10=0;.............)

Vậy .........