Mathematics
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current location：Mathematical operation > History of Inequality Computation
    7200/b+2b>240
    b^2+3600b-120>0
    4-5x＞-21
    61640289042269.184-5.65*315089Y（237169Y^2-1129514.88）+5.65*896469.6Y = 0
    61640289042269.184-315089Y（237169Y^2-1129514.88）+5.65*896469.6Y = 0
    61640289042269.184Y-315089Y（237169Y^2-1129514.88）+5.65*896469.6Y = 0
    91902.5536*61640289042269.184Y-315089Y（237169Y^2-1129514.88）+5.65*896469.6Y=0
    61640289042269.184+315089Y（237169Y^2-1129514.88）+5.65*896469.6Y=0
    61640289042269.184-315089Y（237169Y^2+1129514.88）-5.65*896469.6Y=0
    61640289042269.184-315089Y（237169Y^2-1129514.88）+5.65*896469.6Y=0
    61789761210185.216-315089Y（237169Y^2-1129514.88）+5.65*896469.6Y=0
    61789761210185.216-315089Y（237169Y^2-1129514.88+896469.6Y）=0
    61640289042269.184+0.647+315089Y（237169Y^2-1129514.88+896469.6Y）=0
    61640289042269.184+0.647-315089Y（237169Y^2-1129514.88+896469.6Y）=0
    91902.5536Y×61640289042270+0.647-315089Y×（237169Y^2-1129514.88+896469.6Y）5.65=0
    91902.5536Y×61640289042270-315089Y×（237169Y^2-1129514.88+896469.6Y）×5.65=0
    91902.5536Y×61640289042270-315089Y×（237169Y^2-1129514.88+896469.6Y）5.65=0
    0.8335x/(1-0.8335X)=0.3
    0.8X/(1-0.8X)=23
    (3-x)/(5+x)＜0.8x/(1-0.5x)

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