(247500*X-192,539.925*X-100000)/247500*X=0.8285
    (247500*X-192,539.925*X-100000)/247500*X=0.8285
    (247500*X-192,539.925*X-100000)/247500*X=0.8285
    (247500*X-192,539.925*X-100000)/247500*X=0.8285
    (247500*X-192,539.925*X-300000)/247500*X=0.8285
    (247500*X-192,539.925*X-300000)/247500*X=0.778
    (247500*X-192,539.925*X-200000)/247500*X=0.778
    (247500*X-192,539.925*X-100000)/247500*X=0.778
    (247500*X-192,539.925*X-180000)/247500*X=0.778
    (8100+50+X)*3.3%=4X
    x（1.2-0.2x^3）^（2.5）-0.455
     x^3+10x^2+25x+15 = 0
    x^3+10x^2+20x+15=0
    (192539*(8+x)-180000)=275000*(8+x)*0.7
    x(2x+0.01)^2=5.1*10^(-12)
    (192539*X-180000)=275000*X*0.7
    (192539*X+180000)=275000*X*0.7
    (192539*X+180000)=275000*X*0.7
    (192539*X+180000)=70*275000*X/100
    (192539*X)=77.56*275000*X/100

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