20x<= -40<br>-4/27x> -2/9
x<= -2<br>x< 1,5
_\\\\\\\\\__________ где точка -2 кружочек закрашенный
-2
_\\\\\\\\\\\\\\\\\\\\\\\\____________ незакрашенный
1,5
(-беск; -2]
-10x< -10/3
-4,8x<-1,6<br>
x>1/3
x>1/3
_______////////////////_________
1/3
(1/3;беск)
5x> -30
-20/30x>= -5/11
x>-6
x<=15/22<br>
____////////////////////////_______
-6
_\\\\\\\\\\\\\\\\\\\\\\\\\\\\________
15/22
(-6;15/22]