4/9=396/x

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Solution for 4/9=396/x equation: 


D( x )

x = 0

x = 0

x = 0

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

4/9 = 396/x // - 396/x

4/9-(396/x) = 0

4/9-396*x^-1 = 0

-396*x^-1 = -4/9 // : -396

x^-1 = 1/891

-1 < 0

1/(x^1) = 1/891 // * x^1

1 = 1/891*x^1 // : 1/891

891 = x^1

x = 891

x = 891

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