a) 4x - 5 < sau egal 2 \ +5
4x < sau egal 7
x < sau egal 7/4 => x apartine {0,1}
b) 7x + 9 > 3x - 7
7x - 3x > -16
4x > -16
x > -4 => x apartine {-4,-3,-2,-1.....}
c) 2|x-1|+3x< sau egal 3(x+2)
2x+1+3x< sau egal 3x+6
5x+1< sau egal 3x+6
5x-3x< sau egal 5
2x < sau egal 5
x < sau egal 5/2 => x apartine {2,1}
d)3|x+2|-2x< sau egal 2(2-x)+5
3x-2-2x< sau egal 4-2x+5
x-2< sau egal 4-2x+5
3x< sau egal 11
x< sau egal 11/3 => x apartine {3,2,1,0,-1....}
