Question

ai cho em biết với ạ |3x-1|+4=9    x = bn ạ

Answer 1

|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=

Answer 2

|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

Answer 3

2 bạn ạ

Answer 4

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 \(x=\frac{-4}{3}\)