\[\boxed{\mathbf{176}.}\]
\[a_{12} = 14,5;\ \ d = - 2,5:\]
\[a_{12} = a_{1} + 11d\]
\[a_{1} + 11 \cdot ( - 2,5) = 14,5\]
\[a_{1} - 27,5 = 14,5\]
\[a_{1} = 42.\]