\[- 4x - 7y = 5,6:\]
\[- 4x = 5,6 + 7y\]
\[x = - \frac{7}{4}y - 1,4;\]
\[- 7y = 5,6 + 4x\]
\[y = - \frac{4}{7}x - 0,8.\]