\[7x² - 11x - 6 = 0;\ \ \ x_{1} = 2\]
\[x^{2} - \frac{11}{7}x - \frac{6}{7} = 0\]
\[x_{1} + x_{2} = \frac{11}{7}\]
\[2 + x_{2} = 1\frac{4}{7}\]
\[x_{2} = - \frac{3}{7}.\]