(4x+x+7)/(x-4)

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Solution for (4x+x+7)/(x-4) equation: 


D( x )

x-4 = 0

x-4 = 0

x-4 = 0

x-4 = 0 // + 4

x = 4

x in (-oo:4) U (4:+oo)

(4*x+x+7)/(x-4) = 0

(5*x+7)/(x-4) = 0

5*x+7 = 0 // - 7

5*x = -7 // : 5

x = -7/5

x = -7/5

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