(3x+4)/(x-9)

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Solution for (3x+4)/(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+4)/(x-9) = 0

3*x+4 = 0 // - 4

3*x = -4 // : 3

x = -4/3

x = -4/3

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