в) $$5 \frac{5}{12} + z = -3 \frac{1}{3}$$.

$$5 \frac{5}{12} + z = -3 \frac{1}{3}$$ z = -3 \frac{1}{3} - 5 \frac{5}{12} z = -\frac{10}{3} - \frac{65}{12} z = \frac{-10 \cdot 4 - 65}{12} z = \frac{-40 - 65}{12} z = \frac{-105}{12} z = -\frac{35}{4} z = -8 \frac{3}{4}$$