\[\frac{4 - 7x^{2}}{2 - x} + \frac{6x^{2}}{2 - x} =\]
\[= \frac{4 - 7x^{2} + 6x^{2}}{2 - x} = \frac{4 - x^{2}}{2 - x} =\]
\[= \frac{(2 - x)(2 + x)}{2 - x} = 2 + x;\]
\[x = - \frac{3}{4} = - 0,75:\]
\[2 - 0,75 = 1,25.\]
\[Ответ:1,25.\]