3（x-1）＞x-4,解得 x >-1/2
x+11/2＞5（x+2）/2 ,解得 x < 1/3
综合得-1/2 < x < 1/3

则有 -1 < 2x < 2/3 ,0 < 2x+1 <5/3
-1 < -3x < 3/2, 0