1)
2x-5<0 => 2x<5 => x<2,5
1,4x-7<0 => 1,4x<7 => x<5
6-x<0 => -x<-6 => x>6
2)
1-y>0 => -y>-1 => y<1
y+8>0 => y>-8
3y-4,5 >0 => 3y>4,5 => y>1,5
1)
2x-5<0 => 2x<5 => x<2,5
1,4x-7<0 => 1,4x<7 => x<5
6-x<0 => -x<-6 => x>6
2)
1-y>0 => -y>-1 => y<1
y+8>0 => y>-8
3y-4,5 >0 => 3y>4,5 => y>1,5