X/87-40/1333-40/1650=0.0019(X+80)
    x+4=2x
    x+44=2x
    x-4=2x
    X/87+21/126-35/2000-40/1650=0.00238(X+96)
    X/87+21/126-35/2000-40/1650=0.00214(X+96)
    X/132+21/126-35/2000-40/1650=0.00214(X+96)
    X/132+21/126-35/2000-40/1650=0.00238(X+96)
    （27.776+x）×2.95＝55.552+76.128-x
    （27.776+x）×2.75＝55.552+76.128-x
    （27.776+x）×2.55＝55.552+76.128-x
    （27.776+x）×2.25＝55.552+76.128-x
    （27.776+x）×2.35＝55.552+76.128-x
    （27.776+x）×2.35＝55.552+76.128-x
    （27.776+x）×2.15＝55.552+76.128-x
    y^2+（24-2y）^2＝169
    1.1(1.2-x)＝1.2+x
    x + 1 = 1
    3x/4+675/(576x)=51/24
    3x/4+675/576x=51/24

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