28/y=4/7

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Solution for 28/y=4/7 equation: 


D( y )

y = 0

y = 0

y = 0

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

28/y = 4/7 // - 4/7

28/y-(4/7) = 0

28/y-4/7 = 0

28*y^-1 = 4/7 // : 28

y^-1 = 1/49

-1 < 0

1/(y^1) = 1/49 // * y^1

1 = 1/49*y^1 // : 1/49

49 = y^1

y = 49

y = 49

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