Question

/2x-1/=5

 

Answer 1

⇒2x-1=5;2x-1=-5

⇒2x=6;2x=-4

⇒x=3;x=-2

Answer 2

x=3;x=-2

 

Answer 3

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

\(\Rightarrow\left[{}\begin{matrix}2x-1=5\\2x-1=-5\end{matrix}\right.\)

\(\Rightarrow\left[{}\begin{matrix}x=3\\x=-2\end{matrix}\right.\)

Vậy: \(x\in\left\{3;-2\right\}\)

Answer 4

\(| 2x - 1 | = 5 \) 

\(\rightarrow | 2x - 1 | = | 5| = | -5 |\) 

\(\rightarrow \begin{cases} 2x - 1 = 5\\2x - 1 = -5 \end{cases}\) 

\(\rightarrow \begin{cases} 2x = 6\\2x = -4 \end{cases}\)

\(\rightarrow\begin{cases} x = 3\\x = -2 \end{cases}\) 

\(Vậy \) \(x \in \) { \(3 ; -2 \) } \(thì \) \(| 2x-1| = 5\)