14/13=21/y

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Solution for 14/13=21/y equation: 


D( y )

y = 0

y = 0

y = 0

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

14/13 = 21/y // - 21/y

14/13-(21/y) = 0

14/13-21*y^-1 = 0

-21*y^-1 = -14/13 // : -21

y^-1 = 2/39

-1 < 0

1/(y^1) = 2/39 // * y^1

1 = 2/39*y^1 // : 2/39

39/2 = y^1

y = 39/2

y = 39/2

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