Y×0.3÷3%-(Y×0.3÷3%)*60%-489=0
    x^5-3x^4-2x^2-3x+1
    x^3+4x^2+6x=0.28
    Y×0.3÷3%-(Y×0.3÷3%)*60%-489=0
    Y×0.3÷3%-(Y×0.3÷3%)*60%-489=0
    (x/3%)-60%-5656=0
    0.06X+X=439299.62
    679*4.68+4.7*x=
    679*4.68+4.7*x=679*4.7+4.7*x
    (14−x−8)(400+x÷0.5×20)＝1560
    x3-2x2=144
    (20+2x)(120-x-80)=1200
    6d+3d²＝3+14d
    X-X/1.01*0.01-(X-X/1.01*0.01)*0.043=367717.51
    -2x²+60x+8000=1200
    X-X/1.01*0.01-(X-X/1.01*0.01)*0.043=1014968.78
    （2x）²+（√3x）²=（20√7）²
    （x+10）*（140-x）=x*1.5（130-x）
    x-0.85x = 65*0.85
    x-0.15x = 65*0.15

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