Question

как решить неравенство такого вида {x>8
{9-x<0

Answer 1

$\left \{ {{x\ \textgreater \ 8} \atop {9-x\ \textless \ 0}} \right. \ =\ \textgreater \ \left \{ {{x\ \textgreater \ 8} \atop {x\ \textgreater \ 9}} \right. \\ \\ x \in (9;+\infty)$