9- 5x+1/2>x+5
9-5+1/2>x+5x
6x<9/2<br>X<3/4<br>
1,75+ 2x/31 3/4 + 2/3x 1 3/4-1 2/3 < x-2/3x
1/12<1 3x<br>1/4
4+y/2-y+2/7-y+y/2-y<3-2/7-4<br>-1 1/2y<-1 2/7<br>1 1/2y>1 2/7
y>1 2/7:1 1/2
y> 6/7
4+7y-3/5>3y+5/4-3y/2
7y-3y+3/2y>5/4-4+3/5
5 1/2y>-2 3/20
y>-1 21/22