2/7=8/5/x

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Solution for 2/7=8/5/x equation: 


D( x )

x = 0

x = 0

x = 0

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

2/7 = (8/5)/x // - (8/5)/x

2/7-((8/5)/x) = 0

(-8/5)*x^-1+2/7 = 0

-8/5*x^-1 = -2/7 // : -8/5

x^-1 = 5/28

-1 < 0

1/(x^1) = 5/28 // * x^1

1 = 5/28*x^1 // : 5/28

28/5 = x^1

x = 28/5

x = 28/5

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