(3x-1)/(x+9)

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Solution for (3x-1)/(x+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)

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

3*x-1 = 0 // + 1

3*x = 1 // : 3

x = 1/3

x = 1/3

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