20/y=5/7

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Solution for 20/y=5/7 equation: 


D( y )

y = 0

y = 0

y = 0

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

20/y = 5/7 // - 5/7

20/y-(5/7) = 0

20/y-5/7 = 0

20*y^-1 = 5/7 // : 20

y^-1 = 1/28

-1 < 0

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

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

28 = y^1

y = 28

y = 28

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