9-5=27/-y

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Solution for 9-5=27/-y equation: 


D( y )

-y = 0

-y = 0

y = 0

y in (-oo:0) U (0:+oo)

9-5 = 27/(-y) // - 27/(-y)

9-(27/(-y))-5 = 0

27*y^-1-5+9 = 0

27*y^-1 = -4 // : 27

y^-1 = -4/27

-1 < 0

1/(y^1) = -4/27 // * y^1

1 = -4/27*y^1 // : -4/27

-27/4 = y^1

y = -27/4

y = -27/4

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