3－2x＜1
    2x－2≤3x
    3(x+1)＜2x+3
    x+3>4
    1-1/2x>-2
    1/3x-1>2
    x+4>4x-5
    10*1.5+2(x-10)≧25
    4.14%x+4.14%(2000-x)(1-5%)≧81
    4x>=-28
    -2*x-1>0
    3m-2>=0
    3m-2<=7
    3/4*x>x/4-2
    （x-1）/5
    4x+5<=3（x+2）
    (x-3)/2-1<0
    1/2x-1<=7-3/2x
    2x+1≥-3, 1/3x<0
    5-(x-3)≥0

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