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    4x-3(5-2x)=7x
    1x/2-2=2 x+7
    2.2*x+5*x=832
    -x² -1.5 x
    x² +1.5 x - 10 = 0
    -x² -1.5 x + 10 = 0
    25x^3-32x^2+72=0
    (4x²-9)/x^3 = 25/8
    (4x²-9)/x^3 = 25/8
     (4x²-9)/x^3=25/8
    y^4+3y^3+y^2=0
    [28-(27.1-0.1x)]x+0.5x=24
    √100-x^2*x=100
    √100-x²*x=100
    (-k+√(k^2+16))/2=-k-√(k^2+16)
    x^2+5x-9/2
    x/(10+x)=0.58
    x/10+x=0.58
    x²=(x-5)²+120²
    2x^3-3^2+1=0

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