Question 242363
0.4x+2<0.8x-9
.4x-.8x<-9-2
-.4x<-11
x>-11/-.4 note: the < changes to a > when divided by a negative value.
x>27.5 ans.
Proof:
Let x=28
.4*28+2<.8*28-9
11.2+2<22.4-9
11.2<13.4