20/30=100/x

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Solution for 20/30=100/x equation: 


D( x )

x = 0

x = 0

x = 0

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

20/30 = 100/x // - 100/x

20/30-(100/x) = 0

20/30-100*x^-1 = 0

-100*x^-1 = -2/3 // : -100

x^-1 = 1/150

-1 < 0

1/(x^1) = 1/150 // * x^1

1 = 1/150*x^1 // : 1/150

150 = x^1

x = 150

x = 150

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