(4/X-5)+7

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Solution for (4/X-5)+7 equation: 


D( X )

X = 0

X = 0

X = 0

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

4/X-5+7 = 0

4*X^-1 = -2 // : 4

X^-1 = -1/2

-1 < 0

1/(X^1) = -1/2 // * X^1

1 = -1/2*X^1 // : -1/2

-2 = X^1

X = -2

X = -2

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