20/(x-4)=4

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Solution for 20/(x-4)=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)

20/(x-4) = 4 // - 4

20/(x-4)-4 = 0

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

20-4*(x-4) = 0

36-4*x = 0

(36-4*x)/(x-4) = 0

(36-4*x)/(x-4) = 0 // * x-4

36-4*x = 0

36-4*x = 0 // - 36

-4*x = -36 // : -4

x = -36/(-4)

x = 9

x = 9

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