[tex] - \frac{2}{5x} - 9 < \frac{9}{10} \\ - \frac{2}{5x} ( - 9 + 9) < \frac{9}{10} + (9) \\ - \frac{2}{5x} < \frac{99}{10} \\ - \frac{2}{5x} \times (5x) < \frac{99}{10} \times (5x) \\ - 2 < \frac{99}{2} x \\ \frac{ \frac{ - 2}{1} }{ (\frac{99}{2} )} < x \\ - \frac{ 4}{99} < x[/tex]
