2分之(x-5)+1<x-3 0.5x-2.5+1-0.5x<-1.5x>3 2分之(1+x)≥3分之(2x-1)3(1+x)≥2(2x-1)3+3x≥4x-2-x≥-5x≤5 2分之(x+1)-4分之(x-3)>1 2(x+1)-(x-3)>42x+2-x+3>4x>-1 1+2分之x>﹣3分之(x-1)6+3x>-2(x-1)6+3x>-2x+25x>-4x>-0.8