(9-a)/x=81

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Solution for (9-a)/x=81 equation: 


D( x )

x = 0

x = 0

x = 0

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

(9-a)/x = 81 // - 81

(9-a)/x-81 = 0

(9-a)/x+(-81*x)/x = 0

9-a-81*x = 0

(9-a-81*x)/x = 0

(9-a-81*x)/x = 0 // * x

9-a-81*x = 0

9-a-81*x = 0 // - 9-a

-81*x = -(9-a) // : -81

x = (-(9-a))/(-81)

x = (a-9)/(-81)

x = (a-9)/(-81)

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