1/3=7/x-4+2

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Solution for 1/3=7/x-4+2 equation: 


D( x )

x = 0

x = 0

x = 0

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

1/3 = 7/x-4+2 // - 7/x-4+2

1/3-(7/x)-2+4 = 0

1/3-7*x^-1-2+4 = 0

-7*x^-1 = -7/3 // : -7

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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