4/y-4=5

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Solution for 4/y-4=5 equation: 


D( y )

y = 0

y = 0

y = 0

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

4/y-4 = 5 // - 5

4/y-5-4 = 0

4*y^-1 = 9 // : 4

y^-1 = 9/4

-1 < 0

1/(y^1) = 9/4 // * y^1

1 = 9/4*y^1 // : 9/4

4/9 = y^1

y = 4/9

y = 4/9

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