21/y-8=5

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Solution for 21/y-8=5 equation: 


D( y )

y = 0

y = 0

y = 0

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

21/y-8 = 5 // - 5

21/y-8-5 = 0

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

y^-1 = 13/21

-1 < 0

1/(y^1) = 13/21 // * y^1

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

21/13 = y^1

y = 21/13

y = 21/13

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