7/(x-4)=2

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Solution for 7/(x-4)=2 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)

7/(x-4) = 2 // - 2

7/(x-4)-2 = 0

7/(x-4)+(-2*(x-4))/(x-4) = 0

7-2*(x-4) = 0

15-2*x = 0

(15-2*x)/(x-4) = 0

(15-2*x)/(x-4) = 0 // * x-4

15-2*x = 0

15-2*x = 0 // - 15

-2*x = -15 // : -2

x = -15/(-2)

x = 15/2

x = 15/2

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