Question

решите систему неравенств:

Answer 1

$\left \{ {{-x+7>0} \atop {2x<-8}} \right.\\\\\left \{ {{-x>-7} \atop {x<-4}} \right.\\\\\left \{ {{x<7} \atop {x<-4}} \right.$

\\\\\\\\\\\\\\\\

_______(-4)_______(7)________

\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\

Ответ : x ∈ ( - ∞ ; - 4)