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
    sin x^1/2
    x×lnx-x×ln0.273=0.378
    xxx+3x-4=0
    X-X*0.065-(X+1582847)*0.0003=1582847
    （400+X）/32.07=14.47

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