(4/y)=(2/9)

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Solution for (4/y)=(2/9) equation: 


D( y )

y = 0

y = 0

y = 0

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

4/y = 2/9 // - 2/9

4/y-(2/9) = 0

4/y-2/9 = 0

4*y^-1 = 2/9 // : 4

y^-1 = 1/18

-1 < 0

1/(y^1) = 1/18 // * y^1

1 = 1/18*y^1 // : 1/18

18 = y^1

y = 18

y = 18

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