2/3*((1-1/0.06)+(3/4+1/0.06)*(1/3*206.51/x*0.35805183739485175)^0.06)=5.960784314/x
    2/3*((1-1/0.06)+(3/4+1/0.06)*(1/3*208.34/x*0.35805183739485175)^0.06)=6.004901961/x
    2/3*((1-1/0.06)+(3/4+1/0.06)*(1/3*210.17/x*0.35805183739485175)^0.06)=6.314705882/x
    2/3*((1-1/0.06)+(3/4+1/0.06)*(1/3*212/x*0.35805183739485175)^0.06)=6.862745098/x
    2/3*((1-1/0.06)+(3/4+1/0.06)*(1/3*213.83/x*0.35805183739485175)^0.06)=7.016666667/x
    2/3*((1-1/0.06)+(3/4+1/0.06)*(1/3*215.66/x*0.35805183739485175)^0.06)=7.075490196/x
    2/3*((1-1/0.06)+(3/4+1/0.06)*(1/3*217.3/x*0.35805183739485175)^0.06)=7.079411765/x
    2/3*((1-1/0.06)+(3/4+1/0.06)*(1/3*219.5/x*0.35805183739485175)^0.06)=7.259803922/x
    2/3*((1-1/0.06)+(3/4+1/0.06)*(1/3*221.15/x*0.35805183739485175)^0.06)=7.310784314/x
    2/3*((1-1/0.06)+(3/4+1/0.06)*(1/3*222.25/x*0.35805183739485175)^0.06)=7.333333333/x
    x/0.09+(1050009.97-x)/0.13=9954215.28
    2/3*((1-1/0.06)+(3/4+1/0.06)*(1/3*216.2/x*0.35805183739485175)^0.06)=7.33333333/x
    x/0.09+(1257274.22-x)/0.13=13141676.65
    3t+5×（42-t）=150
    x^2-2x-1=0
    （x-3/2）（x-4）
    6x+4(135-2x)=440
    x^3+6*x^2+8*x+(16*sqrt(3))/9=0
    2/3*((1-1/0.03)+(3/4+1/0.03)*(1/3*172/x*0.35805183739485175)^0.03)=6.176470588/x
    5(X-1)+1/2=(X-1)+(2/9+3/2)

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