81/180=30/x

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Solution for 81/180=30/x equation: 


D( x )

x = 0

x = 0

x = 0

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

81/180 = 30/x // - 30/x

81/180-(30/x) = 0

81/180-30*x^-1 = 0

-30*x^-1 = -9/20 // : -30

x^-1 = 3/200

-1 < 0

1/(x^1) = 3/200 // * x^1

1 = 3/200*x^1 // : 3/200

200/3 = x^1

x = 200/3

x = 200/3

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