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X in (-oo:+oo)
(1/2)*(16-X) = 0
1/2*(16-X) = 0
( 1/2 )
1/2 = 0
X belongs to the empty set
( 16-X )
16-X = 0 // - 16
-X = -16 // * -1
X = 16
X = 16
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