-3/1=12/y

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Solution for -3/1=12/y equation: 


D( y )

y = 0

y = 0

y = 0

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

-3/1 = 12/y // - 12/y

-(12/y)-3/1 = 0

-12*y^-1-3 = 0

-12*y^-1 = 3 // : -12

y^-1 = -1/4

-1 < 0

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

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

-4 = y^1

y = -4

y = -4

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