Răspuns :
1. -7x<42
-7x:(-7)>42:(-7)
x>-6
2. 2x-4<-18
2x<-18+4
2x<-14
x<-7
3. -5(x+1)>-15
x+1< 3
x< 3-1
x<2
4. |x+1|< 3
x+1=3 x+1=-3
x=2 x=-4
1. -7x<42
-7x:(-7)>42:(-7)
x>-6
2. 2x-4<-18
2x<-18+4
2x<-14
x<-7
3. -5(x+1)>-15
x+1< 3
x< 3-1
x<2
4. |x+1|< 3
x+1=3 x+1=-3
x=2 x=-4