13/7=4/y

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Solution for 13/7=4/y equation: 


D( y )

y = 0

y = 0

y = 0

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

13/7 = 4/y // - 4/y

13/7-(4/y) = 0

13/7-4*y^-1 = 0

-4*y^-1 = -13/7 // : -4

y^-1 = 13/28

-1 < 0

1/(y^1) = 13/28 // * y^1

1 = 13/28*y^1 // : 13/28

28/13 = y^1

y = 28/13

y = 28/13

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