28/9=42/s

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Solution for 28/9=42/s equation: 


D( s )

s = 0

s = 0

s = 0

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

28/9 = 42/s // - 42/s

28/9-(42/s) = 0

28/9-42*s^-1 = 0

-42*s^-1 = -28/9 // : -42

s^-1 = 2/27

-1 < 0

1/(s^1) = 2/27 // * s^1

1 = 2/27*s^1 // : 2/27

27/2 = s^1

s = 27/2

s = 27/2

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