8.505*n^15=15.1
    377500/250000=n^15
    15.745=（（0.021*x^1.85+2293）^0.5）*x^0.84
    4[20（t+2）+30t]+25*3t+30*3t+(t+2+0.75）*6*20=500t+400
    X/（X+500）=49%
    x*x+x=36
    22.09/x = 2/3*((1-1/0.5)+(3/4+1/0.5)*(1/3*333.8/x*0.35805183739485175）^0.5)
    13.38/x = 2/3*((1-1/0.5)+(3/4+1/0.5)*(1/3*290/x*0.35805183739485175）^0.5)
    9.67/x = 2/3*((1-1/0.5)+(3/4+1/0.5)*(1/3*230.3/x*0.35805183739485175）^0.5)
    14.46/x = 2/3*((1-1/0.5)+(3/4+1/0.5)*(1/3*285.8/x*0.35805183739485175）^0.5)
    15.6/x = 2/3*((1-1/0.5)+(3/4+1/0.5)*(1/3*289.1/x*0.35805183739485175）^0.5)
    11.18/x = 2/3*((1-1/0.5)+(3/4+1/0.5)*(1/3*227.8/x*0.35805183739485175）^0.5)
    12.27/x = 2/3*((1-1/0.5)+(3/4+1/0.5)*(1/3*262.5/x*0.35805183739485175）^0.5)
    23.59/x = 2/3*((1-1/0.5)+(3/4+1/0.5)*(1/3*300.1/x*0.35805183739485175）^0.5)
    20.84/x=2/3*((1-1/0.5)+(3/4+1/0.5)*(1/3*317.7/x*0.35805183739485175）^0.5)
    8.44/x=2/3*((1-1/0.5)+(3/4+1/0.5)*(1/3*244.6/x*0.35805183739485175）^0.5)
    9.67643/x=2/3*((1-1/0.05)+(3/4+1/0.05)*(1/3*226.72/x*0.35805183739485175）^0.05)
    9.67643/x-2/3*((1-1/0.025)+(3/4+1/0.025)*(1/3*226.72/x*（0.3580518373947788)^0.025)）=0
    0.57*2.52*x=5.06
    x*2.52*2.52=5.06

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