x = 16500/167
    x = 16500/167
    3x*x＝10000-200x
    3x*x＝100000000-2000000x
    1/√x=1.74-2*lg(2*0.1/20+18.7/(22335.1120939*√x))
    8x-24/25x-40=1/4
    (0.14-X/0.14-0.1)=(-150-0/-150-100)
    (5X-1)/6=(7/3)
    5X-1/6=7/3
    4.545*0.7944/(4.545-1.785397)+2.485*0.2030/(2.485-1.785397)+1*0.002606/(1-1.785397)+0.845*0/(0.845-1.785397) = x+1
    4.545*0.4576/(4.545-1.785397)+2.485*0.1190/(2.485-1.785397)+1*0.2557/(1-1.785397)+0.845*0.1678/(0.845-1.785397)=x+1
    4.545*0.4576/(4.545-x)+2.485*0.1190/(2.485-x)+1*0.2557/(1-x)+0.845*0.1678/(0.845-x)=0.7
    4.545*0.4576/(4.545-x)+2.485*0.1190/(2.485-x)+1*0.2557/(1-x)+0.845*0.1678/(0.845-x)=0.7
    (1-x)/x^(3/2)=0.0009
    (1-x)/x^(3/2)=0.0009
    x*0.13+x=673040
    (57-x)*x*0.02466=4.7
    x^2=(0.01-x)*10^-0.2
    0.39x+lnx=-2.98
    5＝3x－2

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