\(\frac{2}{3}x=\frac{5}{4}+\frac{1}{2}x\)

\(\Rightarrow\frac{2}{3}x-\frac{1}{2}x=\frac{5}{4}\)

\(\frac{1}{6}x=\frac{5}{4}\)

\(x=\frac{5}{4}:\frac{1}{6}\)

x = 15/2

2/3.x = 5/4 + 1/2 . x

2/3. x - 1/2 . x =5/4

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

1/3.x=5/4

x=5/4:1/3

x=15/4

x = 1/42

3x + 2 = 5 

     3x  = 5 - 2

     3x  = 3

       x  = 3 : 3

       x  = 1

3.x+2=5  

x={5-2] : 3

x=1

3.x+2=5

3.x=5-2

3.x=3

x=3:3

x=1

\(x-2\frac{1}{4}=3\frac{1}{2}\)

\(x-\frac{9}{4}=\frac{7}{2}\)

\(x=\frac{7}{2}+\frac{9}{4}\)

\(x=\frac{14}{4}+\frac{9}{4}\)

\(x=\frac{23}{4}\)

\(|x|-\frac{3}{4}=\frac{5}{3}\)

\(\left|x\right|=\frac{5}{3}-\frac{3}{4}\)

\(\left|x\right|=\frac{20}{12}-\frac{9}{12}\)

\(\left|x\right|=\frac{11}{12}\)

\(\Rightarrow\orbr{\begin{cases}\left|x\right|=\frac{11}{12}\\\left|x\right|=\frac{-11}{12}\end{cases}}\)

\(|x|-\frac{3}{4}=\frac{5}{3}\)

\(|x|=\frac{5}{3}+\frac{3}{4}\)

\(|x|=\frac{20}{12}+\frac{9}{12}\)

\(|x|=\frac{29}{12}\)

\(\Rightarrow x=\frac{29}{12}\)hoặc \(x=\frac{-29}{12}\)

a) ( x + 3 ) = 0

     x          = 0 - 3

     x          = -3

b) ( x-2 ). ( 5 - x ) = 0

=> \(\hept{\begin{cases}x-2=0\\5-x=0\end{cases}}\)

c) ( x - 1) .( x^2 + 4) = 0

=> \(\hept{\begin{cases}x-1=0\\x^2+4=0\end{cases}}\)

trả lời:

A =1+X= 0

A=1+(-1)=0

vậy x=-1

hok tốt nhé

tk nhé

x=-(10+9+8+...)

lên mạng mà hỏi có đấy bạn