-1<=-1.5x<0
    3(x-1)+2<5x+3 (x/3)<((x+1)/4)
    x-2(x-2）x≤4
    X—2（x—2）≤4
    2/X-（0.1x+0.8）/x<5x
    (x-2)/3+4＞x
    2(x-1)+3＜3x
    22400≤200x+240(100-x)≤22500
    3<2a+1<7
    x-（7x/6+8/6）≤1+x/2
    41x>-11
    17x-13>-24x-24
    （x-3）/4+（2x-1）/3>-2（x+1）
    6-3x-6x-10>-x-1
    7x>3x-10
    6/5x≥-2(1-x)
    5/12-x-1/3<=x/6
    4a+1>0
    2a-1<0
    3X减11小于6X减2

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