(X*1.5%)+ (247841.77-X)=247841.77
    (X*1.5%)+ 247841.77-X=247841.77
    （247841.77-（X*1.5%））+(X*1.5%)=247841.77
    （247841.77-X*1.5%）+(X*1.5%)=247841.77
    1+x^2=2x^2
    9x^-20x+4=0
    150=x+0.25x
    x-0.064x=12
    0.25=50/X
    x^4+6*x^2+8=0
    x^2-x^2e-1.1x-0.01|09=0
    x^2-x^2e-1.1x-0.0127|67=0
    x^2-x^2e-1.1x-0.001|89=0
    x^2-x^2e-1.1x-0.07|23=0
    x^2-x^2e-1.1x-0.0109=0
    x=ln(3+sqrt(5))-ln2
    x-x/1.05*0.05-x/1.05*0.05*0.07*0.5-x/1.05*0.12*0.5-x*0.001*0.5=6000
    x-x/1.05*0.05-x/1.05*0.05*0.07*0.5-x/1.05*0.12*0.5-x*0.001*0.5=4800
    x-x/1.05*0.015-x/1.05*0.015*0.07*0.5-x/1.05*0.02=16800
    lnx=12.15

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