（a-1）/a=94.12%
    1.8^x=x
    -90-arctanw-arctan（0.1w）=-180
    -90-arctanw-arctan0.1w=-180
    -90-arctanw-arctan0.1w=120
    x/(14.2478-138/x)=tan 89
    x/(14.25-138/x)=tan 89
    (50.5-44)/(44-39)=(70-T)/(T-56)
    (41-30)/(30-30)=(70-T)/(T-56)
    （236+5X）÷（51+X）=4.7
    1.0787x/(40+1000x)=0.0002
    1.0787x/(50+1000x)=0.0002
    (99-82)/(82-62)=(100-T)/(T-86)
    （236+5X）÷（51+X）=4.99
    （236+5X）÷（51+X）=5
    （236+5X）÷（51+X）=4.8
    （236+5X）÷（51+X）=4.9
    2.04x^2-4.344x+0.304=0
    X^2-2.1x+0.1=0
    (99-73)/(73-62)=(100-T)/(T-86)

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