\[\boxed{\mathbf{210.}}\]
\[\textbf{а)}\ 1 \leq x \leq 3;\ \ 2 < x \leq 8;\]
\[2 < x \leq 3.\]
\[\textbf{б)}\ x > 8;\ \ x > 5;\]
\[x > 8.\]
\[\textbf{в)}\ x \leq 1,5;\ - 3 \leq x \leq 6;\]
\[- 3 \leq x \leq 1,5.\]
\[\textbf{г)}\ 2 < x < 9;\ \ x \geq 5,7;\]
\[5,7 \leq x < 9.\]