X+x×2.75%×3=97,425
    X+x×2.75%×3等于97425
    x^2-14.2x+48=0
    （260*27*2-x）*0.9+32*27=12270.1
    171180=X+X*1.05+X*1.05*1.05
    （X-98）/X=35%
    y＝0.272÷0.44+6E-17
    y＝0.272÷0.2720.44+6E-17
    y＝0.272×0.44+6E-17
    x*0.85=2203366
    x*80%=2203366
    x*80%=1053793
    X*20%=1053793
    x*0.6%=4129.33
    x^2-2x=0 (x^2-2x)^2-2(x^2-2x)=0 ((x^2-2x)^2-2(x^2-2x))^2-2((x^2-2x)^2-2(x^2-2x))=0
    abs(x-1)+(x^2-3x+2)^2=0
    x^2-3x+2=0 cotx^2-3cotx+2=0
    (155*x+34.4*26)/(155+26)=22.7 (155*x+39.5*31)/(155+31)=26.4 (155*x+39.5*31)/(155+31)=24.4 (155*x+36.2*27)/(155+27)=23.1 (155*x+40*40.4)/(155+40)=26.6 (155*x+35.8*33)/(155+33)=26.4
    (155*x+34.4*26)/(155+26)=22.7 (155*x+39.5*31)/(155+31)=26.4
    (x*155+31*35.5)/(155+31)=22.6

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