21/x=7/2

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Solution for 21/x=7/2 equation: 


D( x )

x = 0

x = 0

x = 0

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

21/x = 7/2 // - 7/2

21/x-(7/2) = 0

21/x-7/2 = 0

21*x^-1 = 7/2 // : 21

x^-1 = 1/6

-1 < 0

1/(x^1) = 1/6 // * x^1

1 = 1/6*x^1 // : 1/6

6 = x^1

x = 6

x = 6

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