12/20=30/x

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Solution for 12/20=30/x equation: 


D( x )

x = 0

x = 0

x = 0

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

12/20 = 30/x // - 30/x

12/20-(30/x) = 0

12/20-30*x^-1 = 0

-30*x^-1 = -3/5 // : -30

x^-1 = 1/50

-1 < 0

1/(x^1) = 1/50 // * x^1

1 = 1/50*x^1 // : 1/50

50 = x^1

x = 50

x = 50

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