4=-7/y-3

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


D( y )

y = 0

y = 0

y = 0

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

4 = -7/y-3 // + -7/y-3

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

7*y^-1+3+4 = 0

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

y^-1 = -1

-1 < 0

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

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

-1 = y^1

y = -1

y = -1

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