4.33X+X = 74
    7.05X+X=74
    （86942-x）/x=27.19%
    x^6-5x^5+3x^4+x^3-7x^2+7x-20=0
    （59412-x）/x=185%
    x*x-2730x+186231.8841
    x^3+6x^2+11x-24=0
    x—（x-800）*0.2＝848
    x*x-2840x+186231.8841=0
    2200000000=13.8×1600x(1176-x/2)
    898580000=13.8×1500x(910-x/2)
    898580000=13.8×180x(910-x/2)
    898580000=13.8×180x(817-x/2)
    5X-8X=158
    （42.309+x）1.55＝71.418+42.309-x
    （42.309+x）1.75＝71.418+42.309-x
    （42.309+x）1.75＝72.418+42.309-x
    （42.309+x）1.55＝72.418+42.309-x
    898580000=13.8×180x(765-x/2)
    （42.309+x）1.55＝74.418+42.309-x

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