3/x-7=21

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Solution for 3/x-7=21 equation: 


D( x )

x = 0

x = 0

x = 0

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

3/x-7 = 21 // - 21

3/x-21-7 = 0

3*x^-1 = 28 // : 3

x^-1 = 28/3

-1 < 0

1/(x^1) = 28/3 // * x^1

1 = 28/3*x^1 // : 28/3

3/28 = x^1

x = 3/28

x = 3/28

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