3/y-4/7

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Solution for 3/y-4/7 equation: 


D( y )

y = 0

y = 0

y = 0

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

3/y-(4/7) = 0

3/y-4/7 = 0

3*y^-1 = 4/7 // : 3

y^-1 = 4/21

-1 < 0

1/(y^1) = 4/21 // * y^1

1 = 4/21*y^1 // : 4/21

21/4 = y^1

y = 21/4

y = 21/4

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