Помогите плиииииииииз

Решите задачу:

$\left \{ {{2x-5\ \textgreater \ 7} \atop {2x-5\ \textless \ 13}} \right. \\ \left \{ {{2x\ \textgreater \ 7+5} \atop {2x\ \textless \ 13+5}} \right. \\ \left \{ {{2x\ \textgreater \ 12} \atop {2x\ \textless \ 18}} \right. \\ \left \{ {{x\ \textgreater \ 12/2} \atop {x\ \textless \ 18/2}} \right. \\ \left \{ {{x\ \textgreater \ 6} \atop {x\ \textless \ 9}} \right. \\ (6:9)$