-20=-4x/6x

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Solution for -20=-4x/6x equation: 


x in (-oo:+oo)

-20 = ((-4*x)/6)*x // - ((-4*x)/6)*x

-(((-4*x)/6)*x)-20 = 0

(2/3)*x^2-20 = 0

2/3*x^2 = 20 // : 2/3

x^2 = 30

x^2 = 30 // ^ 1/2

abs(x) = 30^(1/2)

x = 30^(1/2) or x = -30^(1/2)

x in { 30^(1/2), -30^(1/2) }

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