(X+1)/(X-3)=4

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Solution for (X+1)/(X-3)=4 equation: 


D( X )

X-3 = 0

X-3 = 0

X-3 = 0

X-3 = 0 // + 3

X = 3

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

(X+1)/(X-3) = 4 // - 4

(X+1)/(X-3)-4 = 0

(X+1)/(X-3)+(-4*(X-3))/(X-3) = 0

X-4*(X-3)+1 = 0

13-3*X = 0

(13-3*X)/(X-3) = 0

(13-3*X)/(X-3) = 0 // * X-3

13-3*X = 0

13-3*X = 0 // - 13

-3*X = -13 // : -3

X = -13/(-3)

X = 13/3

X = 13/3

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