-1/(x-4)=7

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Solution for -1/(x-4)=7 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)

-1/(x-4) = 7 // - 7

-1/(x-4)-7 = 0

(-7*(x-4))/(x-4)-1/(x-4) = 0

-7*(x-4)-1 = 0

27-7*x = 0

(27-7*x)/(x-4) = 0

(27-7*x)/(x-4) = 0 // * x-4

27-7*x = 0

27-7*x = 0 // - 27

-7*x = -27 // : -7

x = -27/(-7)

x = 27/7

x = 27/7

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