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    12.25×c=(3.3+c)×7.92
    12.25×c=(3.3+c)×7.93
    1/(x+20)=1/x+(2x+20)/(x²+20x+200)
    x²-12.8x+32.6=0
    3x/2x=100
    3/2*x=100
    3/2x=100
    ln(1/2+x)
    x*x+1*x+2*x+3
    5/12X=6/8
    (1920+x)÷(3622+x)=0.60
    3+x=5
    (1920+x)/(3622+x)=0.65
    630*(1+X)^3=660
    630*(1+X)^3=660
    x^8+x^6-320=0
    x^3+5x^2+20x+80
    x^2-16.8x+69.1=0
    (1+g)/g=22.5
    x^x=x

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