г) 2\frac{1}{3}(а + 6)-7\frac{2}{3}(3-а) при а = -0,7.

г) $$2\frac{1}{3}(а + 6)-7\frac{2}{3}(3-а)$$ при $$а = -0,7$$.

$$2\frac{1}{3}(-0.7 + 6)-7\frac{2}{3}(3-(-0.7)) = 2\frac{1}{3}(5.3)-7\frac{2}{3}(3.7) = \frac{7}{3} \cdot 5.3 - \frac{23}{3} \cdot 3.7 = \frac{37.1}{3} - \frac{85.1}{3} = \frac{-48}{3} = -16$$

Ответ: -16