(64.27-y)/y=-0.0426-(y-67.13)/67.13
    (64.49-y)/y=-0.0295-(y-66.45)/66.45
    (64.49-y)/y=-0.0295-(y-66.45)/66.45
    (64.49-y)/y=-0.0295-(y-66.45)/66.45
    (64.27-y)/y=-0.0426-(y-67.13)/67.13
    (64.27-y)/y=-0.0426-(y-67.13)/67.13
    (64.27-y)/y=-0.0426-(y-67.13)/67.13
    (64.49-y)/y=-0.0295-(y-66.45)/66.45
    1/x=2.035lg（222600*x）-0.91
    1/x=2.035lg（632944.85*x）-0.91
    2400/a-50=400/a+2000/(a+2)
    xxxxx-2xxx-2x+1=0
    6387.84*(10.542*670/(0.1X+670)+33.31125)=5955.24*(14.28*670/(0.2X+670)+41.1075*670/(0.1X+670))
    6387.84*(10.542*670/(0.1X+670)+33.31125)=6228.84*(14.28*670/(0.2X+670)+41.1075*670/(0.1X+670))
    6387.84*(10.542*670/(0.1X+670)+33.31125)=6228.84*(14.28*670/(0.2X+670)+41.1075*(0.1X+670))
    （800+x-12168.93）x（1-25%）+5213.15=5634.18
    （800+x-12168.93）x（1-25%）+5213.15=5634.18
    11315496/(670+0.2x)+7543664/(670+x)+25931010/(670+0.1x)+17287340/(670+x)=9092034/(670+0.1x)+6061356/(670+x)+32734.8+14621554/(670+x)
    11315496/(670+0.2x)+7543664/(670+x)+25931010/(670+0.1x)+17287340/(670+x)=9092034/(670+0.1x)+6061356/(670+x)+32734.8+14621554/(670+x)
    11315496/(670+0.2x)+7543664/(670+x)+25931010/(670+0.1x)+17287340/(670+x)=9092034/(670+0.1x)+6061356/(670+x)+32734.8+14621554/(670+x)

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