12/(x-9)=6/9

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Solution for 12/(x-9)=6/9 equation: 


D( x )

x-9 = 0

x-9 = 0

x-9 = 0

x-9 = 0 // + 9

x = 9

x in (-oo:9) U (9:+oo)

12/(x-9) = 6/9 // - 6/9

12/(x-9)-(6/9) = 0

12/(x-9)-2/3 = 0

(3*12)/(3*(x-9))+(-2*(x-9))/(3*(x-9)) = 0

3*12-2*(x-9) = 0

54-2*x = 0

(54-2*x)/(3*(x-9)) = 0

(54-2*x)/(3*(x-9)) = 0 // * 3*(x-9)

54-2*x = 0

54-2*x = 0 // - 54

-2*x = -54 // : -2

x = -54/(-2)

x = 27

x = 27

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