\[- 15x \leq 25\]
\[x \geq - \frac{25}{15}\]
\[x \geq - \frac{5}{3}\]
\[x \geq - 1\frac{2}{3}\]
\[Ответ:\ x \in \left\lbrack - 1\frac{2}{3};\ + \infty \right).\]