x√1/5
    x^2+252300/x^2=1073
    2^-1/x
    （x-16）（-30x+960）=1920
    （80-x）（60+5x）=7200
    36/x=4/3
    36/3*x=4
    36/3x=4
    600+100x=300(x-6)
    600=200(x-6)
    600+100x=200(x-6)
    (10000/162)*x+(150-10000/162)*x=25100
    (10000/154)*x+(150-10000/154)*x=25100
    (10000/154)*x+(150-10000/154)*x=25000
    (10000/154)*x+(150-10000/154)*x=27500
    (10000/154)*x+(150-10000/154)*x=27600
    (10000/154)*x+(150-10000/154)*x=27600
    (10000/154)*x+(150-10000/154)*x=30000
    2x-6=0
    2x=6

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