42/14=9/x

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Solution for 42/14=9/x equation: 


D( x )

x = 0

x = 0

x = 0

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

42/14 = 9/x // - 9/x

42/14-(9/x) = 0

42/14-9*x^-1 = 0

-9*x^-1 = -3 // : -9

x^-1 = 1/3

-1 < 0

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

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

3 = x^1

x = 3

x = 3

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