Решение:
\[ 3(x + 3) - 2(x - 3) = 3 \]
\[ 3x + 9 - 2x + 6 = 3 \]
\[ (3x - 2x) + (9 + 6) = 3 \]
\[ x + 15 = 3 \]
\[ x = 3 - 15 \]
\[ x = -12 \]
Ответ: -12