9+(4/x)=7

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Solution for 9+(4/x)=7 equation: 


D( x )

x = 0

x = 0

x = 0

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

4/x+9 = 7 // - 7

4/x-7+9 = 0

4*x^-1 = -2 // : 4

x^-1 = -1/2

-1 < 0

1/(x^1) = -1/2 // * x^1

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

-2 = x^1

x = -2

x = -2

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