[tex]\it \left \{ {{3(x-40)<-3} \atop {5-2x>1}} \right.[/tex]
[tex]\it 3(x-40)<-3 <=>x-40<-1<=>x<-1=40 <=>x<39[/tex]
[tex]\it 5-2x>1<=>-2x>1-5<=>-2x>-4<=>x<2[/tex]
[tex]\it \left \{ {{x<39} \atop {x<2}} \right. \Rightarrow x \in (\it -infinit,2)[/tex]
[tex]\it x<2[/tex]
