(X^2*ln(0.68*3.10/4.07/X))/((1-X)^2)*ln(0.32*3.10/4.89/(1-X)) = 1
    140×7.86+13c=（140+c）×7.93
    (X^2*ln(0.68*3.10/4.07/X))/((1-X)^2)*ln(0.32*3.10/4.79/(1-X)) = 1
    (X^2*ln(0.68*3.10/4.07/X))/((1-X)^2)*ln(0.32*3.10/3.79/(1-X)) = 1
    140×7.86+13c=（140+c）×7.95
    (X^2*ln(0.68*3.10/4.07/X))/((1-X)^2)*ln(0.32*3.10/5.5/(1-X))=1
    (X^2*ln(0.68*3.10/4.07/X))/((1-X)^2)*ln(0.32*3.10/5.0/(1-X))=1
    (X^2*ln(0.68*3.10/4.07/X))/((1-X)^2)*ln(0.32*3.10/5.79/(1-X))=1
    (X^2*ln(0.68*3.10/4.07/X))/((1-X)^2)*ln(0.32*3.10/4.79/(1-X))=1
    (X^2*ln(0.68*3.10/4.07/X))/((1-X)^2)*ln(0.32*3.10/6.79/(1-X))=1
    (X^2*ln(0.68*3.10/4.07/X))/((1-X)^2)*ln(0.32*3.10/37.9/(1-X))=1
    (X^2*ln(0.68*3.10/4.07/X))/((1-X)^2)*ln(0.32*3.10/3.79/(1-X))=1
    (X^2*ln(0.66*2.72/4.07/X))/((1-X)^2)*ln(0.34*2.72/28/(1-X))=1
    (X^2*ln(0.62*3.41/4.07/X))/((1-X)^2)*ln(0.38*3.41/31.7/(1-X))=1
    (X^2*ln(0.66*2.72/4.07/X))/((1-X)^2)*ln(0.34*2.72/2.8/(1-X))=1
    (X^2*ln(0.8*2.72/4.07/X))/((1-X)^2)*ln(0.2*2.72/2.8/(1-X))=1
    (X^2*ln(0.8*3.41/4.07/X))/((1-X)^2)*ln(0.2*3.41/31.7/(1-X))=1
    (X^2*ln(0.8*3.41/4.07/X))/((1-X)^2)*ln(0.2*3.41/3.17/(1-X))=1
    917=【13000×X×（1+X）^24】÷【（1+X）^24-1】
    917=【13000×X×（1+X）^12】÷【（1+X）^11】

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