\[|7x + 8| \leq 2\]
\[- 2 \leq 7x + 8 \leq 2\]
\[- 10 \leq 7x \leq - 6\]
\[- \frac{10}{7} \leq x \leq - \frac{6}{7}\]
\[Ответ:\left\lbrack - 1\frac{3}{7};\ - \frac{6}{7} \right\rbrack.\]