1-12/(3x-9)

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Solution for 1-12/(3x-9) equation: 


D( x )

3*x-9 = 0

3*x-9 = 0

3*x-9 = 0

3*x-9 = 0 // + 9

3*x = 9 // : 3

x = 9/3

x = 3

x in (-oo:3) U (3:+oo)

1-(12/(3*x-9)) = 0

1-12*(3*x-9)^-1 = 0

1-12/(3*x-9) = 0

(1*(3*x-9))/(3*x-9)-12/(3*x-9) = 0

1*(3*x-9)-12 = 0

3*x-21 = 0

(3*x-21)/(3*x-9) = 0

(3*x-21)/(3*x-9) = 0 // * 3*x-9

3*x-21 = 0

3*x-21 = 0 // + 21

3*x = 21 // : 3

x = 21/3

x = 7

x = 7

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