2/3*((1-1/0.01)+(3/4+1/0.01)*(1/3*150/x*0.35805183739485175)^0.01)=4.784313725/x
    2/3*((1-1/0.2)+(3/4+1/0.2)*(1/3*150/x*0.35805183739485175)^0.2)=4.784313725/x
    2/3*((1-1/0.13)+(3/4+1/0.13)*(1/3*150/x*0.35805183739485175)^0.13)=4.784313725/x
    2/3*((1-1/0.07)+(3/4+1/0.07)*(1/3*150/x*0.35805183739485175)^0.07)=4.784313725/x
    2/3*((1-1/0.05)+(3/4+1/0.05)*(1/3*150/x*0.35805183739485175)^0.05)=4.784313725/x
    2/3*((1-1/0.03)+(3/4+1/0.03)*(1/3*150/x*0.35805183739485175)^0.03)=4.784313725/x
    3(X+4)=4(X+1)
    8X-3(X+50)=100
    5(X+24)=380
    tanx=1
    0.73x+0.65(50－x)＝34.1
    13.13c=（3.4+c）×7.93
    13.13c=（3.4+c）×7.92
    13.13c=（3.3+c）×7.93
    13.13c=（3.3+c）×7.92
    2（x-13）=x+6+6
    2（x-13）=x+12+13
    x^2+x-1=0
    x=1-2.10%
    lg40.8-lg59.2=7.967-1668.2/(228+x)-7.879+1473/(230+x)

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