（10-√3/3x）^2+x^2=196
    2/3x^2-20 √3/3x-96
    2/3x^2-20 √3/3x-104=0
    x^2=4
    100+2/3x^2-20 √3/3x+x^2=204
    0.05x+3=0.01x+35
    25*2+2(x-2*2)=0.9(25*2+2x)
    20*2+2.5(x-20)+0.3x=74
    (24-8*x)/7=(5*x+3)/13-1
    x^2/（0.01-x）=0.08
    x^2/x=0.08
    x^2/(0.01-x)=0.08
    x*2/(0.01-x)=0.08
    3x-2÷5=2
    3（-3+x）=x-1
    lnx=-0.45
    1.2 + 4 X = 56
    n*(n+2)=26.75628231529548
    X加x加0.5x=132
    x^2+6x+7=0

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