1.1*2662.434*10^6 = 13.8*1900x*(1340-0.5x)
    (8.054-x)*(1.946-1.455*x)^1.455=(6-x)*(4-1.455*x)^1.455
    10.40x^3+89.40x^2+12.76x-1135.21=0
    （3x+10x^2)^1.67/(3+2*10.05x)^0.67=22.14
    (8.054-x)*(1.946-1.46*x)^1.46=(6-x)*(4-1.46*x)^1.46
    （5000*12*0.9-70%*130X*6.4%）/（30%*130X+5%*130X）=3.8%
    x-√5x=√6
    10.40x^3+95.46x^2+199.4x-723.27=0
    1.1*1750.704*10^6 = 13.8*1900x*(1340-0.5x)
    （5000*12*0.9-70%*130X*6.4%）
    x+2=1
    x^4-4*x^3+8*x^2-8*x-8=0
    43498.8*x*x-1757.740*x+3.3=0
    10.40x^3+117.13x^2+342.55x-516.24=0
    43498.8*x*x-242.25*x+3.3=0
    1.1*5897.64*10^6=13.8*1900x*(1340-0.5x)
    （72.8/465.84）*x^2+1=x
    0.6049-(1+x)/x*3.15% = 0
    0.6049-(1+x)*3.15%=0
    0.6-0.15*((1+x)/x)*0.05*1=0

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