20/7=40/x

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Solution for 20/7=40/x equation: 


D( x )

x = 0

x = 0

x = 0

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

20/7 = 40/x // - 40/x

20/7-(40/x) = 0

20/7-40*x^-1 = 0

-40*x^-1 = -20/7 // : -40

x^-1 = 1/14

-1 < 0

1/(x^1) = 1/14 // * x^1

1 = 1/14*x^1 // : 1/14

14 = x^1

x = 14

x = 14

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