4=2/3-9/y

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Solution for 4=2/3-9/y equation: 


D( y )

y = 0

y = 0

y = 0

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

4 = 2/3-(9/y) // - 2/3-(9/y)

9/y-(2/3)+4 = 0

9/y-2/3+4 = 0

9*y^-1 = -10/3 // : 9

y^-1 = -10/27

-1 < 0

1/(y^1) = -10/27 // * y^1

1 = -10/27*y^1 // : -10/27

-27/10 = y^1

y = -27/10

y = -27/10

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