40/360=20/x

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Solution for 40/360=20/x equation: 


D( x )

x = 0

x = 0

x = 0

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

40/360 = 20/x // - 20/x

40/360-(20/x) = 0

40/360-20*x^-1 = 0

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

x^-1 = 1/180

-1 < 0

1/(x^1) = 1/180 // * x^1

1 = 1/180*x^1 // : 1/180

180 = x^1

x = 180

x = 180

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