8%X=4X
    2.09x^(3)+31.4x^(2) = 235
    569985-330.787*（1000+273.15）+8.314*（1000+273.15）ln(([(100/x)-1]^2)*0.01^2 )= 0
    569985-330.787*（1000+273.15）+8.314*（1000+273.15）ln(([(100/x)-1]^2)*0.1^2 )= 0
    569985-330.787*（1000+273.15）+8.314*（1000+273.15）ln(([(100/x)-1]^2)*1^2 )= 0
    s+(2.4-0.8)=4.2
    2.09x^(3)+31.4x^(2) = 117.75
    (8.2+1.4)f=12
    (6-2.5)y=15.4
    2.09x^(3)+31.4x^(2)=94.2
    k-(2.7+130%)=107/5
    5X＋10＝30
    569985-330.787*（900+273.15）+8.314*（900+273.15）ln(([(100/x)-1]^2)*0.01^2 )= 0
    17x^(2)-32x+15＝0
    569985-330.787*（900+273.15）+8.314*（900+273.15）ln(([(100/x)-1]^2)*0.1^2 )= 0
    569985-330.787*（900+273.15）+8.314*（900+273.15）ln(([(100/x)-1]^2)*1^2 )= 0
    2.282x^(2)-0.312=0
    569985-330.787*（800+273.15）+8.314*（800+273.15）ln(([(100/x)-1]^2)*1^2 )= 0
    569985-330.787*（800+273.15）+8.314*（800+273.15）ln(([(100/x)-1]^2)*0.1^2 )= 0
    （1000-100x)(8+2x)=10000

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