3/y-4=5/y

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Solution for 3/y-4=5/y equation: 


D( y )

y = 0

y = 0

y = 0

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

3/y-4 = 5/y // - 5/y

3/y-(5/y)-4 = 0

3/y-5*y^-1-4 = 0

-2*y^-1 = 4 // : -2

y^-1 = -2

-1 < 0

1/(y^1) = -2 // * y^1

1 = -2*y^1 // : -2

-1/2 = y^1

y = -1/2

y = -1/2

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