\[\boxed{\text{882.\ }\text{еуроки}\text{-}\text{ответы}\text{\ }\text{на}\text{\ }\text{пятёрку}}\]
\[\textbf{а)}\ х\ \left| \begin{matrix} 5 > 2 \\ 4 > 3 \\ \end{matrix} \right.\ \]
\[\text{\ \ \ \ \ \ \ }\overline{\ \ 20 > 6\ \ \ }\]
\[\textbf{б)}\ х\left| \begin{matrix} 8 < 10 \\ \frac{1}{4} < \frac{1}{2} \\ \end{matrix} \right.\ \]
\[\text{\ \ \ \ \ \ }\overline{\ \ 2 < 5\ \ \ \ }\]