9/1/5=20/x

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Solution for 9/1/5=20/x equation: 


D( x )

x = 0

x = 0

x = 0

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

(9/1)/5 = 20/x // - 20/x

(9/1)/5-(20/x) = 0

9/5-20*x^-1 = 0

-20*x^-1 = -9/5 // : -20

x^-1 = 9/100

-1 < 0

1/(x^1) = 9/100 // * x^1

1 = 9/100*x^1 // : 9/100

100/9 = x^1

x = 100/9

x = 100/9

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