30/x=40/14

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Solution for 30/x=40/14 equation: 


D( x )

x = 0

x = 0

x = 0

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

30/x = 40/14 // - 40/14

30/x-(40/14) = 0

30/x-20/7 = 0

30*x^-1 = 20/7 // : 30

x^-1 = 2/21

-1 < 0

1/(x^1) = 2/21 // * x^1

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

21/2 = x^1

x = 21/2

x = 21/2

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