21/12=14/x

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Solution for 21/12=14/x equation: 


D( x )

x = 0

x = 0

x = 0

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

21/12 = 14/x // - 14/x

21/12-(14/x) = 0

21/12-14*x^-1 = 0

-14*x^-1 = -7/4 // : -14

x^-1 = 1/8

-1 < 0

1/(x^1) = 1/8 // * x^1

1 = 1/8*x^1 // : 1/8

8 = x^1

x = 8

x = 8

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