3x+6x/3x+9x

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Solution for 3x+6x/3x+9x equation: 


x in (-oo:+oo)

((6*x)/3)*x+3*x+9*x = 0

2*x^2+12*x = 0

DELTA = 12^2-(0*2*4)

DELTA = 144

DELTA > 0

x = (144^(1/2)-12)/(2*2) or x = (-144^(1/2)-12)/(2*2)

x = 0 or x = -6

x in { -6, 0 }

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