\[\boxed{\mathbf{2}\mathbf{.}\mathbf{211}}\]
\[\textbf{а)}\ x + 37 = 71\]
\[x = 71 - 37\]
\[x = 34.\]
\[\textbf{б)}\ x - 37 = 71\]
\[x = 71 + 37\]
\[x = 108.\]
\[\textbf{в)}\ 37 - x = 71\]
\[x = 37 - 71\]
\[37 < 71\]
\[нет\ корней.\]
\[\textbf{г)}\ 71 + x = 37\]
\[x = 37 - 71\]
\[37 < 71\]
\[нет\ корней.\ \]