7/x+2/3=9/x

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Solution for 7/x+2/3=9/x equation: 


D( x )

x = 0

x = 0

x = 0

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

7/x+2/3 = 9/x // - 9/x

7/x-(9/x)+2/3 = 0

7/x-9*x^-1+2/3 = 0

-2*x^-1 = -2/3 // : -2

x^-1 = 1/3

-1 < 0

1/(x^1) = 1/3 // * x^1

1 = 1/3*x^1 // : 1/3

3 = x^1

x = 3

x = 3

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