Решение:
\[ 2 - 3 · 7 - 3 · 2x = 11 \]
\[ 2 - 21 - 6x = 11 \]
\[ -19 - 6x = 11 \]
\[ -6x = 11 + 19 \]
\[ -6x = 30 \]
\[ x = \frac{30}{-6} \]
\[ x = -5 \]
Ответ: -5