3/9=4/y

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Solution for 3/9=4/y equation: 


D( y )

y = 0

y = 0

y = 0

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

3/9 = 4/y // - 4/y

3/9-(4/y) = 0

3/9-4*y^-1 = 0

-4*y^-1 = -1/3 // : -4

y^-1 = 1/12

-1 < 0

1/(y^1) = 1/12 // * y^1

1 = 1/12*y^1 // : 1/12

12 = y^1

y = 12

y = 12

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