1452000X-1200X^2+219744000=565000000
    452000X-1200X^2+219744000=565000000
    （0.121023222-x)/0.004 = 199.6
    X/1.09*0.09-X/1.03*0.03=36581.83
    (0.0028x+0.25)/(1-0.0022x)=(0.75-0.0038)/(0.58+0.0028x)
    1+1/x²
    (70-x)/(100-x)
    100*（1+x）^5=200
    100*（1+x）^8=200
    x*（0.1+x）=1.76*（0.1-x）/100000
    0.0117/x＝0.1289/0.86289
    0.4/100.58＝x/2.95
    2*x/（1+x）=0.28571
    (x-1/x+1)+(x/((x*x)+1))
    (x-1/x+1)+(x/x*x+1)
    6t-（-2+t）=4+3t-6t
    5t+2=4+9t
    X=x/2/4+x/2+15
    X=5x/8+x/2+15
    X=x/2+15+5x/8

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