(x-20)/2=3x

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Solution for (x-20)/2=3x equation: 


x in (-oo:+oo)

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

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

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

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

x-3*2*x-20 = 0

-5*x-20 = 0

(-5*x-20)/2 = 0

(-5*x-20)/2 = 0 // * 2

-5*x-20 = 0

-5*x-20 = 0 // + 20

-5*x = 20 // : -5

x = 20/(-5)

x = -4

x = -4

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