3/x+5/7

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Solution for 3/x+5/7 equation: 


D( x )

x = 0

x = 0

x = 0

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

3/x+5/7 = 0

3*x^-1 = -5/7 // : 3

x^-1 = -5/21

-1 < 0

1/(x^1) = -5/21 // * x^1

1 = -5/21*x^1 // : -5/21

-21/5 = x^1

x = -21/5

x = -21/5

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