36/81=4/x

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Solution for 36/81=4/x equation: 


D( x )

x = 0

x = 0

x = 0

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

36/81 = 4/x // - 4/x

36/81-(4/x) = 0

36/81-4*x^-1 = 0

-4*x^-1 = -4/9 // : -4

x^-1 = 1/9

-1 < 0

1/(x^1) = 1/9 // * x^1

1 = 1/9*x^1 // : 1/9

9 = x^1

x = 9

x = 9

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