\[- 1 \leq 8 - 4x \leq 3\]
\[8 - 1 \leq - 4x \leq 8 - 3\]
\[7 \leq - 4x \leq 5\]
\[- \frac{5}{4} \leq x \leq - \frac{7}{4}\]
\[- 1,25 \leq x \leq - 1,75\]
\[Ответ: - 1,25 \leq x \leq - 1,75.\]