0.13283/x＝0.1289/0.86289
    0.4/100.58＝x/33.4
    x+x*0.01=460000
    x^2-15.8x+61.4=0
    x/(x＋100)＝0.335
    x^2-17.1x+72.9=0
    lg(sqrt(2)k/(25sqrt(10025/10000)))=1.2
    lg(sqrt(2)k/(25sqrt(10025/10000)))
    lg(k/25)=1.2
    (153/32)b^2-33b+112=0
    X=2494405-0.2565X
    X=2288341-0.2565X
    X=2391373-0.2565X
    X=2700469-0.2565X
    0.1*x+20=130/1000*x
    X=2185309-0.2565X
    x^2-5.7x+6.6=0
    5000000×79＝3000000x
    500×79＝300x
    1/x -x =1/2

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