The sum of values of $x$ if $x (x - 2) = 9 - 2 x$ .

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Solution

$x (x - 2) = 9 - 2 x$
$⟹ x^{2} - 2 x = 9 - 2 x$
$⟹ x = \pm 3$
$∴$ Sum of the value of $x = 3 - 3 = 0$

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