\[- 4 \cdot (2,5a - 1,5) + 5,5a - 8 =\]
\[= - 10a + 6 + 5,5a - 8 = - 4,5a - 2\]
\[при\ \ a = - \frac{2}{9}:\]
\[- 4,5a - 2 = - 4,5 \cdot \left( - \frac{2}{9} \right) - 2 =\]
\[= \frac{45 \cdot 2}{10 \cdot 9} - 2 = 1 - 2 = - 1.\]