7/x=-1/3

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Solution for 7/x=-1/3 equation: 


D( x )

x = 0

x = 0

x = 0

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

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

7/x-(-1/3) = 0

7/x+1/3 = 0

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

x^-1 = -1/21

-1 < 0

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

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

-21 = x^1

x = -21

x = -21

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