1/3x-21=3x

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Solution for 1/3x-21=3x equation: 


x in (-oo:+oo)

(1/3)*x-21 = 3*x // - 3*x

(1/3)*x-(3*x)-21 = 0

(1/3)*x-3*x-21 = 0

-8/3*x-21 = 0 // + 21

-8/3*x = 21 // : -8/3

x = 21/(-8/3)

x = -63/8

x = -63/8

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