8 x+64=240
    8 x+64=240
    8 x+64=240
    8 x+64=240
    8 x+64=240
    8 x+64=240
    8 x+64=240
    8 x+64=240
    8 x+64=240
    8 x+64=240
    2 x+14=98
    sqrt（（7.5/2）^2+（6.85/2）^2）=x
    sqrt（（7.47/2）^2+（5.5/2）^2）=x
    sqrt（（6.3/2）^2+（5.32/2）^2）=x
    sqrt（（7.6/2）^2+（5.7/2）^2）=x
    sqrt（（10.1/2）^2+（5.35/2）^2）=x
    sqrt（（10.1/2）^2+（5.35/2）^7）=x
    122x^2+125x-625=0
    3/a+1-a+1
    -3x-3=3/2x-6

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