3/x-4=7/x

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Solution for 3/x-4=7/x equation: 


D( x )

x = 0

x = 0

x = 0

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

3/x-4 = 7/x // - 7/x

3/x-(7/x)-4 = 0

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

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

x^-1 = -1

-1 < 0

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

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

-1 = x^1

x = -1

x = -1

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