5/7=7.5/x

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Solution for 5/7=7.5/x equation: 


D( x )

x = 0

x = 0

x = 0

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

5/7 = 7.5/x // - 7.5/x

5/7-(7.5/x) = 0

5/7-7.5*x^-1 = 0

-7.5*x^-1 = -5/7 // : -7.5

x^-1 = 0.09523809

-1 < 0

1/(x^1) = 0.09523809 // * x^1

1 = 0.09523809*x^1 // : 0.09523809

10.50000058 = x^1

x = 10.50000058

x = 10.50000058

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