Question

`|x+11|=8`

Answer 1

\(\left|x+11\right|=8\\ \Leftrightarrow\left[{}\begin{matrix}x+11=8\\x+11=-8\end{matrix}\right.\\ \Leftrightarrow\left[{}\begin{matrix}x=3\\x=-19\end{matrix}\right.\)

Vậy `x in {3;-19}`

Answer 2

` | x + 11| = 8`

\(\Rightarrow\left[{}\begin{matrix}x+11=8\\x+11=-8\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}x=8-11\\x=-8-11\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}x=-3\\x=-19\end{matrix}\right.\)

 

Answer 3

`|x + 11| = 8`

\(=>\left\{{}\begin{matrix}x+11=8\\x+11=-8\end{matrix}\right.\)

\(=>\left\{{}\begin{matrix}x=-3\\x=-19\end{matrix}\right.\)

Answer 4

`|x+11|=8`

`=>`$\left[\begin{matrix} x+11=8\\ x+11= -8\end{matrix}\right.$

`=>`$\left[\begin{matrix} x=-3 \\ x=-19\end{matrix}\right.$

Vậy `x` `in` `{−3;−19}`

 

Answer 5

`=> x + 11 = 8` hoặc `x + 11 = -8`

`=> x = -3` hoặc `x = -19`.