\(\frac{x-3}{4}=\frac{3x-11}{10}=\frac{3}{20}\)

\(\Leftrightarrow\frac{5\left(x-3\right)}{20}-\frac{2\left(3x-11\right)}{20}=\frac{3}{20}\)

\(\Leftrightarrow\frac{5x-15}{20}-\frac{6x-22}{20}=\frac{3}{20}\)

=> 5x - 15 - 6x + 22 =3

<=>5x - 6x = 15 - 22 + 3

<=>       - x = 4

<=>          x = 4

x=4

\(\frac{5x-1}{10}+\frac{2x+3}{6}=\frac{x-8}{15}-\frac{x}{30}\)

\(\Rightarrow\frac{3\left(5x-1\right)}{30}+\frac{5\left(2x+3\right)}{30}=\frac{2\left(x-8\right)}{30}-\frac{x}{30}\)

\(\Rightarrow15x-3+10x+15=2x-16-x\)

\(\Rightarrow24x=-28\)

\(\Rightarrow x=-\frac{7}{6}\)

Xét x=1,x=2,1<x<2,x<1,x>2 

cam on ban nha. ban hoc truong nao vay?

Ta có : \(4x-\left(2x+1\right)=3-\frac{1}{3}+x\)

(=) \(4x-2x-1=3-\frac{1}{3}+x\)

(=) \(4x-2x-x=3-\frac{1}{3}+1\)

(=) \(x=\frac{11}{3}\)

a) \(\left(x+\frac{7}{4}\right)\times\frac{3}{2}=6\)

\(\Leftrightarrow\left(x+\frac{7}{4}\right)=6\div\frac{3}{2}\)

\(\Leftrightarrow x+\frac{7}{4}=4\)

\(\Leftrightarrow x=4-\frac{7}{4}\)

\(\Leftrightarrow x=\frac{9}{4}\)

b) \(x\div\frac{3}{5}+\frac{2}{5}=\frac{9}{5}\)

\(\Leftrightarrow x\div\frac{3}{5}=\frac{9}{5}-\frac{2}{5}\)

\(\Leftrightarrow x\div\frac{3}{5}=\frac{7}{5}\)

\(\Leftrightarrow x=\frac{7}{5}\times\frac{3}{5}\)

\(\Leftrightarrow x=\frac{21}{25}\)

c) \(\frac{1}{2}\div3+x=\frac{5}{3}\)

\(\Leftrightarrow\frac{1}{6}+x=\frac{5}{3}\)

\(\Leftrightarrow x=\frac{5}{3}-\frac{1}{6}\)

\(\Leftrightarrow x=\frac{3}{2}\)

học đi

|x| = 3/4 

=>  x= -3/4 ; 3/4

Mà x < 0

=>  x= -3/4

\(\left|x\right|=-1\frac{2}{5}\)

\(\Rightarrow x\in\varphi\)

|x| = 0,35 

=>  x = -0,35; 0,35

Mà x >0 

=> x= 0,35

sai het