|3x-1|+4=9
|3x-1| =9-4
|3x-1| =5
\(\Rightarrow\)3x-1=5; 3x-1=-5
\(\Rightarrow\)3x=5+1; 3x=-5+1
\(\Rightarrow\)3x=6; 3x=-4
\(\Rightarrow\)x=
|3x-1|+4=9
|3x-1| = 9-4
|3x-1| = 5
\(\Rightarrow\orbr{\begin{cases}3x-1=5\\3x-1=-5\end{cases}}\Rightarrow\orbr{\begin{cases}3x=6\\3x=-4\end{cases}}\Rightarrow\orbr{\begin{cases}x=2\\x=\frac{-4}{3}\end{cases}}\)
Vậy x=-4/3 hoặc x=2
Ta có: \(\left|3x-1\right|+4=9\)
\(\Leftrightarrow\left|3x-1\right|=9-4=5\)
\(\Rightarrow\orbr{\begin{cases}3x-1=5\\3x-1=-5\end{cases}}\)
\(\Leftrightarrow\orbr{\begin{cases}3x=6\\3x=-4\end{cases}\Leftrightarrow}\orbr{\begin{cases}x=2\\x=\frac{-4}{3}\end{cases}}\)
Vậy \(x=2\)hoặc \(x=\frac{-4}{3}\)
