9/(2x)=90

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Solution for 9/(2x)=90 equation: 


D( x )

2*x = 0

2*x = 0

2*x = 0

2*x = 0 // : 2

x = 0

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

9/(2*x) = 90 // - 90

9/(2*x)-90 = 0

9/2*x^-1 = 90 // : 9/2

x^-1 = 20

-1 < 0

1/(x^1) = 20 // * x^1

1 = 20*x^1 // : 20

1/20 = x^1

x = 1/20

x = 1/20

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