[tex] \frac{1}{x - 5} - \frac{19 - 2x}{(x - 5)(x + 4)} [/tex]
[tex] \frac{1(x - 5)(x + 4)}{(x - 5)(x + 4)} - \frac{19 - 2x}{x - 5)(x + 4)} [/tex]
[tex] \frac{1(x^{2} + 4x - 5x - 20) }{ x^{2} + 4x - 5x - 20} - \frac{19 - 2x}{x^{2} + 4x - 5x - 20} [/tex]
[tex] \frac{ x^{2} - x - 20 }{ x_{2} - x - 20} - \frac{19 - 2x}{ x^{2} - x - 20 } [/tex]
[tex] \frac{ x^{2} + x + 1}{ x^{2} - x - 20 } [/tex]
[tex]-x - \frac{1}{20} [/tex]
