làm gips em với ạ huhuhuhuhuhuhuhu

`b) | 2x - 3| = 5,4`

`=>`\(\left[ \begin{array}{l}2x-3=5,4\\2x-3=-5,4\end{array} \right.\) 

`=>` \(\left[ \begin{array}{l}2x=5,4+3\\2x=-5,4+3\end{array} \right.\) 

`=>` \(\left[ \begin{array}{l}2x=8,4\\2x=-2,4\end{array} \right.\) 

`=>`\(\left[ \begin{array}{l}x=8,4 :  2\\x=-2,4 : 2\end{array} \right.\) 

`=>`\(\left[ \begin{array}{l}x=4,2\\x=-1,2\end{array} \right.\) 

Vậy `x \in { 4,2 ; -1,2}`

`#caty09`