(4/X+7)=(2/X-2)

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Solution for (4/X+7)=(2/X-2) equation: 


D( X )

X = 0

X = 0

X = 0

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

4/X+7 = 2/X-2 // - 2/X-2

4/X-(2/X)+2+7 = 0

4/X-2*X^-1+2+7 = 0

2*X^-1 = -9 // : 2

X^-1 = -9/2

-1 < 0

1/(X^1) = -9/2 // * X^1

1 = -9/2*X^1 // : -9/2

-2/9 = X^1

X = -2/9

X = -2/9

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