a) 62x+31-12x>50x
50x+31>50x
50x-50x> -31
0> -31 Adevărat
b) 3x+7>5x+10-2x-1
3x+7>3x+9
3x-3x>9-7
0>2 Fals
c) amplificam pe x si 4 cu 3
3x+12-x<2x
2x+12<2x
2x-2x< -12
0< -12 Fals
d) amplificam pe 12x, 4x si 3 cu 3
36x-1<12x-9
36x-12x< -9+1
14x< -8
x< -8/14
x< -4/7
