20/y=4

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Solution for 20/y=4 equation: 


D( y )

y = 0

y = 0

y = 0

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

20/y = 4 // - 4

20/y-4 = 0

20*y^-1 = 4 // : 20

y^-1 = 1/5

-1 < 0

1/(y^1) = 1/5 // * y^1

1 = 1/5*y^1 // : 1/5

5 = y^1

y = 5

y = 5

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