7/13=4/y

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Solution for 7/13=4/y equation: 


D( y )

y = 0

y = 0

y = 0

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

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

7/13-(4/y) = 0

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

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

y^-1 = 7/52

-1 < 0

1/(y^1) = 7/52 // * y^1

1 = 7/52*y^1 // : 7/52

52/7 = y^1

y = 52/7

y = 52/7

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