3.a) x<5-1=> x < 4
x apartine Z => S = {3,,2,1,0.......}
b) -x>4-7=> -x > -3
x apartine Z=>S={-2,-1,0........}
c)5x-3x_<10 => 2x<10 :2=>x<5
x apartine Z=>S={4,3,2,1....}
d) x < 1+3=> x<4
x apartine Z=> S={3,2,1,0........}
e)2x<0-2=>2x<-2:2=>x<0
x apartine Z => S={-1,-2,-3 .......}
Si la celelalte tot asa faci.
