4/7=6/y

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Solution for 4/7=6/y equation: 


D( y )

y = 0

y = 0

y = 0

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

4/7 = 6/y // - 6/y

4/7-(6/y) = 0

4/7-6*y^-1 = 0

-6*y^-1 = -4/7 // : -6

y^-1 = 2/21

-1 < 0

1/(y^1) = 2/21 // * y^1

1 = 2/21*y^1 // : 2/21

21/2 = y^1

y = 21/2

y = 21/2

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