Maths - 11x+2<4x-4, 13x+9<6x-15?

11x+2<4x-4
subtract 4x from both sides
11x-4x+2<4x-4x-4
7x+2<-4
subtract 2 from both sides
7x+2-2<-4-2
7x<-6
divide both sides by 7
7x/7<-6/7
x<-6/7

13x+9<6x-15
subtract 6x from both sides
13x-6x+9<6x-6x-15
7x+9<-15
subtract 9 from both sides
7x+9-9<-15-9
7x<-24
divide both sides by 7
7x/7<-24/7
x<-24/7