TeX джерело:

\left\{ \begin{array}{l}17x - 12x > 2 - 1,\\ - 9x + x < - 3 + 1;\end{array} \right.\quad \left\{ \begin{array}{l}5x > 1,\\ - 8x > - 2;\end{array} \right.\quad \left\{ \begin{array}{l}x > \frac{1}{5};\\x > \frac{1}{4}.\end{array} \right.