100/x=800/(x+10)
    100/x=800/x+10
    x－(x－14)－2＝2.42
    X-2%X=5.95
    （x+4）² - x² =96
    （x+4）² - x² =96
    （x+4）² - x² =96
    q^2-20q+110=0
    q^2-20q+110=0
    q^2-20q+110=0
    3q^2-40q+110=0
    3q^2-80q+390=0
    （16/25）*x^2-1000x+260000
    X/111-（95-X）/1000=.143
    2070/(167x+167x-167+167x-334)=x
    3229.96x²+2563.3x-1022.3＝0
    3x^2-e^x
    X+60%x5=37
    X+60%x5=37
    X+60%x5=37

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