(x-3)/2+3≥xx-3+6≥2xx≤3(1)1-3(x-1)<8-x-3x+3<7-x2x>-4x>-2(2)综上-2
由（1）得 x-3+6>=3x x<=3/2由（2）得 1-3x+3<8-x -2x<4 x>-2∴-2
