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
    11t²+640t-1600＝0
    x*(1+152%)*(1+100%)=5.06
    20.5*（1-x^16）=5
    27x-18
    12/x-12/1.2x＝10/60
    12/x-12/1.2＝10/60
    2^3x+4 - 2^3x+3 = 512
    2^3x+4-2^3x+3=512
     15(x-10)+10x = 1600
    1500x-270000 = （1800x-324000）-720000
    1500x-270000 = （1800x-324000）-7200
    1500x-270000=（1800x-324000）-300
    （x-450）*0.75/2000 ={（x-180）*0.75-300}/2400
    100-x/x=0.04
    （x-180）*0.75/2400

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