⇒
$| 3x - 5 | - 1 = 0$
→ $| 3x - 5 | = 1$
→ \(\left[ \begin{array}{l}3x-5=1\\3x-5=-1\end{array} \right.\)
→ \(\left[ \begin{array}{l}3x=1+5\\3x=-1+5\end{array} \right.\)
→ \(\left[ \begin{array}{l}3x=6\\3x=4\end{array} \right.\)
→ \(\left[ \begin{array}{l}x=2\\x=\frac{4}{3} \end{array} \right.\)