（6.81-6.81/1.13*0.13+0.17）/7.08=X
    （5.07-5.07/1.13*0.13+0.12）/7.08=X
    （7.97-7.97/1.13*0.13+0.18）/7.08=X
    18-6x=0.5x^2
    36-24x=0.5x^2
    x^1/4=-1
    2/3*((1-1/0.055)+(3/4+1/0.055)*(1/3*210/x*0.35805183739485175)^0.055)=5.4454/x
    2/3*((1-1/0.055)+(3/4+1/0.055)*(1/3*214.13/x*0.35805183739485175)^0.055)=6.036/x
    2/3*((1-1/0.055)+(3/4+1/0.055)*(1/3*225.82/x*0.35805183739485175)^0.055)=7.2358/x
    2/3*((1-1/0.055)+(3/4+1/0.055)*(1/3*230.6/x*0.35805183739485175)^0.055)=7.7668/x
    2/3*((1-1/0.055)+(3/4+1/0.055)*(1/3*240.1/x*0.35805183739485175)^0.055)=8.825/x
    [(220+260)*28-x]*0.9+18*28=10587.36
    （26.274+x）×0.85＝52.549+67.623-x
    （26.274+x）×0.85＝52.549+68.623-x
    （26.274+x）×0.85＝52.549+69.623-x
    （26.274+x）×0.85＝52.549+70.623-x
    （26.274+x）×0.85＝52.549+71.623-x
    （26.274+x）×0.85＝52.549+72.623-x
    （26.813+x）×0.85＝53.627+74.24-x
    12.13×c=（3.3+c）×8.96

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