43.85^2*1500/3.4*(9-2*x)/(9-x)+36*1.2*(165*2*3.1416*20^2/3.4*x*(43.85/60.35)^2+165*2*3.1416*30^2/3.4*(9-x)*(60.35/43.85)^2)/(75*1500/3.4*9/60.35^2/(9-x)+71*165*2*3.1416*20^2/3.4*x^2/60.35^4+71*165*2*3.1416*30^2/3.4*(9-x)^2/43.85^4)
    43.85^2*1500/3.4*(9-2*x)/(9-x)+36*1.0*(165*2*3.1416*40^2/4/3.4*x*(43.85/60.35)^2+165*2*3.1416*60^2/4/3.4*(9-x)*(60.35/43.85)^2)/(75*1500/3.4*9/60.35^2/(9-x)+71*165*2*3.1416*40^2/4/3.4*x^2/60.35^4+71*165*2*3.1416*60^2/4/3.4*(9-x)^2/43.85^4)
    43.85^2*600/3.4*(9-2*x)/(9-x)+36*1.5*(165*2*3.1416*40^2/4/3.4*x*(43.85/60.35)^2+165*2*3.1416*60^2/4/3.4*(9-x)*(60.35/43.85)^2)/(75*600/3.4*9/60.35^2/(9-x)+71*165*2*3.1416*40^2/4/3.4*x^2/60.35^4+71*165*2*3.1416*60^2/4/3.4*(9-x)^2/43.85^4)
    43.85^2*1200/3.4*(9-2*x)/(9-x)+36*1.5*(165*2*3.1416*40^2/4/3.4*x*(43.85/60.35)^2+165*2*3.1416*60^2/4/3.4*(9-x)*(60.35/43.85)^2)/(75*1200/3.4*9/60.35^2/(9-x)+71*165*2*3.1416*40^2/4/3.4*x^2/60.35^4+71*165*2*3.1416*60^2/4/3.4*(9-x)^2/43.85^4)
    43.85^2*1500/3.4*(9-2*x)/(9-x)+36*1.5*(165*2*3.1416*40^2/4/3.4*x*(43.85/60.35)^2+165*2*3.1416*80^2/4/3.4*(9-x)*(60.35/43.85)^2)/(75*1500/3.4*9/60.35^2/(9-x)+71*165*2*3.1416*40^2/4/3.4*x^2/60.35^4+71*165*2*3.1416*80^2/4/3.4*(9-x)^2/43.85^4)
    43.85^2*1500/3.4*(9-2*x)/(9-x)+36*1.5*(165*2*3.1416*40^2/4/3.4*x*(43.85/60.35)^2+165*2*3.1416*70^2/4/3.4*(9-x)*(60.35/43.85)^2)/(75*1500/3.4*9/60.35^2/(9-x)+71*165*2*3.1416*40^2/4/3.4*x^2/60.35^4+71*165*2*3.1416*70^2/4/3.4*(9-x)^2/43.85^4)
    43.85^2*1500/3.4*(9-2*x)/(9-x)+36*1.5*(165*2*3.1416*50^2/4/3.4*x*(43.85/60.35)^2+165*2*3.1416*60^2/4/3.4*(9-x)*(60.35/43.85)^2)/(75*1500/3.4*9/60.35^2/(9-x)+71*165*2*3.1416*50^2/4/3.4*x^2/60.35^4+71*165*2*3.1416*60^2/4/3.4*(9-x)^2/43.85^4)
    43.85^2*1500/3.4*(9-2*x)/(9-x)+36*1.5*(165*2*3.1416*40^2/4/3.4*x*(43.85/60.35)^2+165*2*3.1416*60^2/4/3.4*(9-x)*(60.35/43.85)^2)/(75*1500/3.4*9/60.35^2/(9-x)+71*165*2*3.1416*40^2/4/3.4*x^2/60.35^4+71*165*2*3.1416*60^2/4/3.4*(9-x)^2/43.85^4)
    43.85^2*1500/3.4*(9-2*x)/(10-x)+36*1.5*(165*2*3.1416*40^2/4/3.4*x*(43.85/60.35)^2+165*2*3.1416*60^2/4/3.4*(9-x)*(60.35/43.85)^2)/(75*1500/3.4*9/60.35^2/(9-x)+71*165*2*3.1416*40^2/4/3.4*x^2/60.35^4+71*165*2*3.1416*60^2/4/3.4*(9-x)^2/43.85^4)
    43.85^2*4000/3.4*(10-2*x)/(10-x)+36*1.5*(165*2*3.1416*40^2/4/3.4*x*(43.85/60.35)^2+165*2*3.1416*60^2/4/3.4*(10-x)*(60.35/43.85)^2)/(75*4000/3.4*9/60.35^2/(10-x)+71*165*2*3.1416*40^2/4/3.4*x^2/60.35^4+71*165*2*3.1416*60^2/4/3.4*(10-x)^2/43.85^4)
    43.85^2*4000/3.4*(9-2*x)/(9-x)+36*1.5*(165*2*3.1416*40^2/4/3.4*x*(43.85/60.35)^2+165*2*3.1416*60^2/4/3.4*(9-x)*(60.35/43.85)^2)/(75*4000/3.4*9/60.35^2/(9-x)+71*165*2*3.1416*40^2/4/3.4*x^2/60.35^4+71*165*2*3.1416*60^2/4/3.4*(9-x)^2/43.85^4)
    43.85^2*2000/3.4*(9-2*x)/(9-x)+36*1.5*(165*2*3.1416*40^2/4/3.4*x*(43.85/60.35)^2+165*2*3.1416*60^2/4/3.4*(9-x)*(60.35/43.85)^2)/(75*2000/3.4*9/60.35^2/(9-x)+71*165*2*3.1416*40^2/4/3.4*x^2/60.35^4+71*165*2*3.1416*60^2/4/3.4*(9-x)^2/43.85^4)
    43.85^2*500/3.4*(9-2*x)/(9-x)+36*1.5*(165*2*3.1416*40^2/4/3.4*x*(43.85/60.35)^2+165*2*3.1416*60^2/4/3.4*(9-x)*(60.35/43.85)^2)/(75*500/3.4*9/60.35^2/(9-x)+71*165*2*3.1416*40^2/4/3.4*x^2/60.35^4+71*165*2*3.1416*60^2/4/3.4*(9-x)^2/43.85^4)
    43.85^2*1000/3.4*(9-2*x)/(9-x)+36*1.5*(165*2*3.1416*40^2/4/3.4*x*(43.85/60.35)^2+165*2*3.1416*60^2/4/3.4*(9-x)*(60.35/43.85)^2)/(75*1000/3.4*9/60.35^2/(9-x)+71*165*2*3.1416*40^2/4/3.4*x^2/60.35^4+71*165*2*3.1416*60^2/4/3.4*(9-x)^2/43.85^4)
    （25.697+x）×2.55＝51.393+69.89-x
    （25.697+x）×2.35＝51.393+69.89-x
    （25.697+x）×2.15＝51.393+69.89-x
    （25.697+x）×1.95＝51.393+69.89-x
    （25.697+x）×1.75＝51.393+69.89-x
    （25.697+x）×1.55＝51.393+69.89-x

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