7/7=5/x

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Solution for 7/7=5/x equation: 


D( x )

x = 0

x = 0

x = 0

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

7/7 = 5/x // - 5/x

7/7-(5/x) = 0

7/7-5*x^-1 = 0

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

x^-1 = 1/5

-1 < 0

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

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

5 = x^1

x = 5

x = 5

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