\( \frac{3(2x-3)}{12} - \frac{2(5x+2)}{12} = 3 \)
\( \frac{6x-9}{12} - \frac{10x+4}{12} = 3 \)
\( \frac{6x-9 - (10x+4)}{12} = 3 \)
\( \frac{6x-9-10x-4}{12} = 3 \)
\( \frac{-4x-13}{12} = 3 \)
\( -4x-13 = 36 \)
\( -4x = 36 + 13 \)
\( -4x = 49 \)
\( x = \frac{49}{-4} \)
\( x = -12.25 \)
Ответ: -12.25