(x+4)/(x-4)=13

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Solution for (x+4)/(x-4)=13 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)

(x+4)/(x-4) = 13 // - 13

(x+4)/(x-4)-13 = 0

(x+4)/(x-4)+(-13*(x-4))/(x-4) = 0

x-13*(x-4)+4 = 0

56-12*x = 0

(56-12*x)/(x-4) = 0

(56-12*x)/(x-4) = 0 // * x-4

56-12*x = 0

56-12*x = 0 // - 56

-12*x = -56 // : -12

x = -56/(-12)

x = 14/3

x = 14/3

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