-((4)/(y-3))=7

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Solution for -((4)/(y-3))=7 equation: 


D( y )

y-3 = 0

y-3 = 0

y-3 = 0

y-3 = 0 // + 3

y = 3

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

-(4/(y-3)) = 7 // - 7

-(4/(y-3))-7 = 0

-4*(y-3)^-1-7 = 0

-4/(y-3)-7 = 0

(-7*(y-3))/(y-3)-4/(y-3) = 0

-7*(y-3)-4 = 0

17-7*y = 0

(17-7*y)/(y-3) = 0

(17-7*y)/(y-3) = 0 // * y-3

17-7*y = 0

17-7*y = 0 // - 17

-7*y = -17 // : -7

y = -17/(-7)

y = 17/7

y = 17/7

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