x2=2/3x

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Solution for x2=2/3x equation: 


x in (-oo:+oo)

x^2 = (2/3)*x // - (2/3)*x

x^2-((2/3)*x) = 0

x^2+(-2/3)*x = 0

x^2-2/3*x = 0

DELTA = (-2/3)^2-(0*1*4)

DELTA = 4/9

DELTA > 0

x = ((4/9)^(1/2)+2/3)/(1*2) or x = (2/3-(4/9)^(1/2))/(1*2)

x = 2/3 or x = 0

x in { 0, 2/3 }

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