20/13=60/x

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Solution for 20/13=60/x equation: 


D( x )

x = 0

x = 0

x = 0

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

20/13 = 60/x // - 60/x

20/13-(60/x) = 0

20/13-60*x^-1 = 0

-60*x^-1 = -20/13 // : -60

x^-1 = 1/39

-1 < 0

1/(x^1) = 1/39 // * x^1

1 = 1/39*x^1 // : 1/39

39 = x^1

x = 39

x = 39

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