3/7=18/x

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Solution for 3/7=18/x equation: 


D( x )

x = 0

x = 0

x = 0

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

3/7 = 18/x // - 18/x

3/7-(18/x) = 0

3/7-18*x^-1 = 0

-18*x^-1 = -3/7 // : -18

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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