16-X=X+4
    1.1x-1.1x/20.27*4.91-1.1x/20.27*2.3-1.1x*0.03-1.1x/20.27*0.16-4423.07-38500-5000-x-593.86-1050=0
    5x^2-40x+32=0
    6x+x=120
    A×3.2%/360×90+A=2.016
    X/87-(96-X)/125=0.73
    A×3.2%/360×90+A=2
    A×3.2%/360×330+A=2
    A×3.2%+A=2
    A×3.2%/360×30+A=2
    A×3.2%×30+A=2
    A×3.2%×330+A=2
    A×3.2%/360×270+A=2
    -ln（x-1）
    tan(x)-x
    【（220+220）*63-X】*0.85+8*63=21679.45
    X/126-(92-X)/1000=0.238
    2=A×3.1%/360×90+A
    （x-x/40）+70 = 8500/0.95
    x^2+22x+9=0

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