13/x=30/42

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Solution for 13/x=30/42 equation: 


D( x )

x = 0

x = 0

x = 0

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

13/x = 30/42 // - 30/42

13/x-(30/42) = 0

13/x-5/7 = 0

13*x^-1 = 5/7 // : 13

x^-1 = 5/91

-1 < 0

1/(x^1) = 5/91 // * x^1

1 = 5/91*x^1 // : 5/91

91/5 = x^1

x = 91/5

x = 91/5

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