1/3x-21=x-7

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Solution for 1/3x-21=x-7 equation: 


x in (-oo:+oo)

(1/3)*x-21 = x-7 // - x-7

(1/3)*x-x-21+7 = 0

-2/3*x-14 = 0 // + 14

-2/3*x = 14 // : -2/3

x = 14/(-2/3)

x = -21

x = -21

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