\[\boxed{\mathbf{Страница\ 42.}еуроки - ответы\ на\ пятёрку}\]
\[\boxed{\mathbf{1.1.}}\]
\[\textbf{а)}\]
\[\textbf{б)}\ M(2;3).\]
\[\boxed{\mathbf{1.2.}}\]
\[210 - (14 \cdot x + 36)\ :4 = 180\]
\[(14 \cdot x + 36)\ :4 = 210 - 180\]
\[(14 \cdot x + 36)\ :4 = 30\]
\[14 \cdot x + 36 = 30 \cdot 4\]
\[14 \cdot x + 36 = 120\]
\[14 \cdot x = 120 - 36\]
\[14 \cdot x = 84\]
\[x = 84\ :14\]
\[x = 6.\]
\[\boxed{\mathbf{1.3.}}\]
\[\textbf{а)}\ n\ :8 - n\ :12\]
\[\textbf{б)}\ m - 3 \cdot (a + b)\]
\[\boxed{\mathbf{1.4.}}\]
\[Ответ:\ C.9.\]