9=-45/x

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Solution for 9=-45/x equation: 


D( x )

x = 0

x = 0

x = 0

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

9 = -45/x // + -45/x

9-(-45/x) = 0

45*x^-1+9 = 0

45*x^-1 = -9 // : 45

x^-1 = -1/5

-1 < 0

1/(x^1) = -1/5 // * x^1

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

-5 = x^1

x = -5

x = -5

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