6/12=21/x

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Solution for 6/12=21/x equation:


D( x )

x = 0

x = 0

x = 0

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

6/12 = 21/x // - 21/x

6/12-(21/x) = 0

6/12-21*x^-1 = 0

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

x^-1 = 1/42

-1 < 0

1/(x^1) = 1/42 // * x^1

1 = 1/42*x^1 // : 1/42

42 = x^1

x = 42

x = 42

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