3/y+9/y=4

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Solution for 3/y+9/y=4 equation: 


D( y )

y = 0

y = 0

y = 0

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

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

3/y+9/y-4 = 0

12*y^-1 = 4 // : 12

y^-1 = 1/3

-1 < 0

1/(y^1) = 1/3 // * y^1

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

3 = y^1

y = 3

y = 3

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