X-7=30/x

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Solution for X-7=30/x equation: 


D( x )

x = 0

x = 0

x = 0

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

X-7 = 30/x // - 30/x

X-(30/x)-7 = 0

X-30*x^-1-7 = 0

-30*x^-1 = -(X-7) // : -30

x^-1 = (7-X)/(-30)

-1 < 0

1/(x^1) = (7-X)/(-30) // * x^1

1 = x^1*((7-X)/(-30)) // : (7-X)/(-30)

-30*(7-X)^-1 = x^1

x = -30*(7-X)^-1

x = -30*(7-X)^-1

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