(6821+X)/(102077+X)≥0.15
    (14417.44+X)/(102077+X)≥0.15
    (14417.44+X)/(97925.62+X)≥0.15
    5x／5+3x≥1
    5x+6＞0
    x+3x-5<95 (3x-5)(12-8)+x(15-10)>371
    x+2-x^2<0
    x/30-1/90≤36
    （x-18）（-2x+100）≤540
    7
    7
    2x＋1＞4
    -3X+2>2X-1
    (6821.28+X)/(102077.62+X)≥0.07
    (500-2*x)- (300-x) >= (300-x)
    (500-2x)-(300-x) >= 300-x
    2X2一4X<0
    (6821.28+X)/(97925.62+X)≥0.07
    4*x*x-4*x+3>0
    x－5／6≤1

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