3x-5.0>2x-1
    x>3/2 x≤3
    2/(a-0.1)+14≤10a/(a-0.2)
    x+3 ≥ 2X
    5-2x<2x-1
    [2/(x-0.2)]+[2/(0.327-0.04)]+[2/(0.327-0.12)]≤[x/(0.1x-0.02)]
    [2/(x-0.2)]+[2/(0.327-0.04)]+[2/(0.327-0.12)]≤[x/(0.1x-0.2*0.1)]
    -3≤3x-1/3≤2
    [2/(x-0.12)]+[2/(x-0.04)]+[2/(x-0.12)]≤[x/(0.06x-0.12*0.06)]
    x-1≤7-x
    5x-2>3x+3
    [2/(x-0.2)]+[2/(x-0.04)]+[2/(x-0.12)]≤[x/(0.06x-0.12*0.06)]
    [2/(x-0.2)]+[2/(x-0.04)]+[2/(x-0.12)]≤[x/(0.02x-0.04*0.02)]
    [2/(x-0.2)]+[2/(x-0.04)]+[2/(x-0.12)]≤[x/(0.1x-0.02)]
    [2/(x-0.2)]+[2/(x-0.04)]+[2/(x-0.12)]≥[x/(0.1x-0.02)]
    2x≥3
    2x-8/x<0
    x^-3x小于等于0
    x^2-3x小于等于0
    （n－1）∧2＜4

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