\[y = \frac{7x - 2}{18 - 10x}\ \]
\[18 - 10x \neq 0\]
\[- 10x \neq 18\]
\[x \neq - \frac{18}{10}\]
\[x \neq - 1,8\]
\[D(y) = ( - \infty; - 1,8) \cup ( - 1,8; + \infty).\]