x+16%x=42
    (88.31/（948.8*9.8）)+4=(X/(970.9*9.8))+0.035+0.35+0.036+2
    x+17%x=42
    88.31/（948.8*9.8）+4=X/(970.9*9.8)+0.035+0.35+0.036+2
    88.31/（948.8*9.8）+4=X/(970.9*9.8)+0.035+0.35+0.036+2
    x^3+2×x^2-5×x-9=0
    x+x12%=42
    (1+x)^2=1+2x
    （377.366*2+a/tan73.293）a/2=52534.54839
    x^2+x-100=0
    (377.366*2+a/tan73)*a/2=52534.54839
    r^2-8r+2=0
    r*2-8r+2=0
    0.30573068a^2+377.366a=105069.0968
    36x^2+x-580=0
    x^2-68x+75＝0
    （42.309+x）×1.95＝73.418+42.309-x
    （42.309+x）×1.75＝73.418+42.309-x
    （42.309+x）×1.55＝73.418+42.309-x
    （42.309+x）×1.35＝73.418+42.309-x

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