§ Стр. 55
\[\boxed{\mathbf{Страница}\mathbf{\ 55}\mathbf{.}\mathbf{\ }}\]
\[\boxed{\mathbf{173}\mathbf{.}\mathbf{\ }}\]

\[x + 10 = 12\]
\[x = 2.\]
\[\textbf{в)}\ 4 \cdot 2 - 2 \cdot 3 = 2\]
\[Вправо\ 2.\]
\[\boxed{\mathbf{Страница}\mathbf{\ 55}\mathbf{.}\mathbf{\ }}\]
\[\boxed{\mathbf{173}\mathbf{.}\mathbf{\ }}\]

\[x + 10 = 12\]
\[x = 2.\]
\[\textbf{в)}\ 4 \cdot 2 - 2 \cdot 3 = 2\]
\[Вправо\ 2.\]