-2=7/(y-4)

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Solution for -2=7/(y-4) equation: 


D( y )

y-4 = 0

y-4 = 0

y-4 = 0

y-4 = 0 // + 4

y = 4

y in (-oo:4) U (4:+oo)

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

-(7/(y-4))-2 = 0

-7*(y-4)^-1-2 = 0

-7/(y-4)-2 = 0

(-2*(y-4))/(y-4)-7/(y-4) = 0

-2*(y-4)-7 = 0

1-2*y = 0

(1-2*y)/(y-4) = 0

(1-2*y)/(y-4) = 0 // * y-4

1-2*y = 0

1-2*y = 0 // - 1

-2*y = -1 // : -2

y = -1/(-2)

y = 1/2

y = 1/2

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