Ответ:

[tex] \frac{13}{18} x + 13 = \frac{17}{12}x + 8 \\ \frac{13}{18} x - \frac{17}{12} x = 8 - 13 \\ \frac{26 - 51}{36}x = - 5 \\ - \frac{25}{36}x = - 5 \\ 36 \times ( - \frac{25}{36}) x= - 5 \times 36 \\ - 25x = - 180 \\ x = - 180 \div( - 25 )\\ x = - \frac{180}{25} \\ x = - \frac{36}{5} \\ x = - 7.2[/tex]