8/5=7/x

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Solution for 8/5=7/x equation: 


D( x )

x = 0

x = 0

x = 0

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

8/5 = 7/x // - 7/x

8/5-(7/x) = 0

8/5-7*x^-1 = 0

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

x^-1 = 8/35

-1 < 0

1/(x^1) = 8/35 // * x^1

1 = 8/35*x^1 // : 8/35

35/8 = x^1

x = 35/8

x = 35/8

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