\[(x + 4)(2x - 1) = x(3x + 11)\]
\[2x^{2} - x + 8x - 4 = 3x^{2} + 11x\]
\[3x^{2} + 11x - 2x^{2} - 7x + 4 = 0\]
\[x^{2} + 4x + 4 = 0\]
\[(x + 2)^{2} = 0\]
\[x = - 2.\]
\[Ответ:\ x = - 2.\]