<=> |x+2| = 13
<=> \(\orbr{\begin{cases}x+2=13\\x+2=-13\end{cases}\Rightarrow}\orbr{\begin{cases}x=11\\x=-15\end{cases}}\)
Vậy.........
hok tốt
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\(|x+2|=12+\left(-3\right)+\left|-4\right|\)
\(|x+2|=12-3+4\)
\(\left|x+2\right|=13\)
\(\Rightarrow x\in\left\{-15;11\right\}\)
\(\left|x+1\right|=12+\left(-3\right)+\left|-4\right|\)
\(\Leftrightarrow\left|x+2\right|=13\)
\(\Leftrightarrow x\in\left\{-15;11\right\}\)
|x+2|=12+(-3)+|-4|
|x+2|=12-3+4
|x+2|=9+4
|x+2|=13
\(\Rightarrow\orbr{\begin{cases}x+2=13\\x+2=-13\end{cases}}\)
\(\Rightarrow\orbr{\begin{cases}x=13-2=11\\x=-13-2=-15\end{cases}}\)
Vậy x=11 hoặc x=-15