Question

Реши систему неравенств {−x+4>07x<−42

x∈(−∞;

).
ОЧЕНЬ СРОЧНО

Answer 1

$\left \{ {{-x+4>0} \atop {7x<-42}} \right.\\\\\left \{ {{-x>-4} \atop {x<-6}} \right.\\\\\left \{ {{x<4} \atop {x<-6}} \right.\\\\Otvet;\boxed{x\in(-\infty;-6)}$