\[\boxed{\mathbf{67}.}\]
\[y = - 6x + 7\]
\[при\ y = - 5:\]
\[- 5 = - 6x + 7\]
\[6x = 12\]
\[x = 2.\]
\[при\ y = 4:\]
\[4 = - 6x + 7\]
\[6x = 3\]
\[x = 0,5.\]