*TH1:x+0.3=0.5
=>x=0.5-0.3
=>x=0.2
*TH2:x+0.3=-0.5
=>x=-0.5-0.3
=>x=-0.8
Vậy :* x=0.2
* x=-0.8
\(\left|x+0,3\right|=0,5\)
\(\Leftrightarrow x+0,3=\pm0, 5\)
\(\Leftrightarrow\left\{{}\begin{matrix}x+0,3=0,5\\x+0,3=-0,5\end{matrix}\right.\)
\(\Leftrightarrow\left\{{}\begin{matrix}x=0,5-0,3\\x=-0,5-0,3\end{matrix}\right.\)
\(\Leftrightarrow\left\{{}\begin{matrix}x=0,2\\x=-\left(0,5+0,3\right)\end{matrix}\right.\)
\(\Leftrightarrow\left\{{}\begin{matrix}x=0,2\\x=-0,8\end{matrix}\right.\)
Vậy \(x=0,2\) hoặc \(x=-0,8\)
\(\left|x+0,3\right|=0,5\)
\(\Rightarrow x+0,3=\pm0,5\)
\(x+0,3=0,5\) \(\Leftrightarrow\) \(x+0,3=-0,5\)
\(x=0,5-0,3\) \(x=-0,5-0,3\)
\(x=0,2\) \(x=-0,8\)
