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    x-lnx=5
    4.3172=((28.02*0.639(x+0.1))/(1+0.639(x+0.1))*((100-6.66-1.14)/100)*(1/(1+0.31*1.14)+((0.76(x+0.1))/(1.3*0.101325))
    √3x+1.5=x+2
    32*x-x^2=120
    600x-x^2=(400-x)^2
     xln(16.67x) = 0.149
     xln(16.67x) = 0.02644
     xln(6.2893x) = 0.02644
     xln(6.29x) = 0.02644
     xln6.29x = 0.0265
     xln6.29x = 0.02644
     xln6.2893x = 0.02644
     xln6.2893x = 0.034264
    xln6.2893x=0.034264
    6x/7+x/5=x+18
    x^2 + 5x + 6 = 0
    x^2-75x+1350=0
    x^2-75x-1350=0
    lnx-1/x
    (1.22-X)/230=(1.48-X)/306

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