\[2x(3x - 2) - 3\left( x^{2} - 4x \right) =\]
\[= 3x(x - 7) + 2\]
\[6x^{2} - 4x - 3x^{2} + 12x =\]
\[= 3x^{2} - 21x + 2\]
\[8x + 21x = 2\]
\[29x = 2\]
\[x = \frac{2}{29}\]
\[Ответ:x = \frac{2}{29}.\]