\[2m + 6n - 11\]
\[m = - 12\ \ и\ \ n = 4:\]
\[2 \cdot ( - 12) + 6 \cdot 4 - 11 =\]
\[= - 24 + 24 - 11 = - 11.\]
\[m = - 3,5\ \ и\ \ n = 3\frac{1}{3}:\]
\[2 \cdot ( - 3,5) + 6 \cdot 3\frac{1}{3} - 11 =\]
\[= - 7 + 6 \cdot \frac{10}{3} - 11 =\]
\[= - 7 + \frac{6 \cdot 10}{3} - 11 =\]
\[= - 7 + 20 - 11 = 2.\]