-3=7/y

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Solution for -3=7/y equation: 


D( y )

y = 0

y = 0

y = 0

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

-3 = 7/y // - 7/y

-(7/y)-3 = 0

-7*y^-1-3 = 0

-7*y^-1 = 3 // : -7

y^-1 = -3/7

-1 < 0

1/(y^1) = -3/7 // * y^1

1 = -3/7*y^1 // : -3/7

-7/3 = y^1

y = -7/3

y = -7/3

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