\[\boxed{\mathbf{6.77}}\]
\[- 6,2x + 2 + 3,6x + 3 = - 14,5\]
\[- 2,6x = - 14,5 - 5\]
\[- 2,6x = - 19,5\]
\[x = - 19,5\ :( - 2,6) = \frac{195}{26}\]
\[x = 7,5.\]
\[- 21y - 5 + 5,6y - 8 = - 20,7\]
\[- 15,4y = - 20,7 + 13\]
\[- 15,4y = - 7,7\]
\[y = - 7,7\ :( - 15,4) = \frac{77}{154}\]
\[y = \frac{1}{2}\]
\[y = 0,5.\]