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)

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

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

27*y^-1 = -9/5 // : 27

y^-1 = -1/15

-1 < 0

1/(y^1) = -1/15 // * y^1

1 = -1/15*y^1 // : -1/15

-15 = y^1

y = -15

y = -15

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