90/x=9

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Solution for 90/x=9 equation: 


D( x )

x = 0

x = 0

x = 0

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

90/x = 9 // - 9

90/x-9 = 0

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

x^-1 = 1/10

-1 < 0

1/(x^1) = 1/10 // * x^1

1 = 1/10*x^1 // : 1/10

10 = x^1

x = 10

x = 10

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