\[|5x - 4| \leq 3\]
\[- 3 \leq 5x - 4 \leq 3\]
\[1 \leq 5x \leq 7\]
\[\frac{1}{5} \leq x \leq \frac{7}{5}\]
\[0,2 \leq x \leq 1,4\]
\[Ответ:\ \lbrack 0,2;1,4\rbrack.\]