Question

укажите решение системы неравенств - 27 +3х>0
6-3х<-6

Answer 1

$\displaystyle\left \{ {{-27+3x>0} \atop {6-3x<-6}} \right.~~\Leftrightarrow~~\left \{ {{3x>27~~~~~|:3} \atop {-3x<-12~~~~~|:(-3)}} \right.\\\\\\\left \{ {{x>9} \atop {x>4}} \right.~~~\Rightarrow~~~\boldsymbol{x>9}$

Ответ : 4)