1) \(\Leftrightarrow\left|x-3\right|=\dfrac{1}{7}\)
\(\Leftrightarrow\left[{}\begin{matrix}x-3=\dfrac{1}{7}\\x-3=-\dfrac{1}{7}\end{matrix}\right.\)\(\Leftrightarrow\left[{}\begin{matrix}x=\dfrac{22}{7}\\x=\dfrac{20}{7}\end{matrix}\right.\)
2) \(\Leftrightarrow\left|x-5\right|=\dfrac{1}{2}\)
\(\Leftrightarrow\left[{}\begin{matrix}x-5=\dfrac{1}{2}\\x-5=-\dfrac{1}{2}\end{matrix}\right.\)\(\Leftrightarrow\left[{}\begin{matrix}x=\dfrac{11}{2}\\x=\dfrac{9}{2}\end{matrix}\right.\)
3) \(\Leftrightarrow\left|x+5\right|=3\)
\(\Leftrightarrow\left[{}\begin{matrix}x+5=3\\x+5=-3\end{matrix}\right.\)\(\Leftrightarrow\left[{}\begin{matrix}x=2\\x=-8\end{matrix}\right.\)
