(x+12)/x=3

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Solution for (x+12)/x=3 equation: 


D( x )

x = 0

x = 0

x = 0

x in (-oo:0) U (0:+oo)

(x+12)/x = 3 // - 3

(x+12)/x-3 = 0

(x+12)/x+(-3*x)/x = 0

x-3*x+12 = 0

12-2*x = 0

(12-2*x)/x = 0

(12-2*x)/x = 0 // * x

12-2*x = 0

12-2*x = 0 // - 12

-2*x = -12 // : -2

x = -12/(-2)

x = 6

x = 6

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