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x in (-oo:+oo)
(2/3)*(14-(12*x)) = 0
(2/3)*(14-12*x) = 0
2/3*(14-12*x) = 0
( 14-12*x )
14-12*x = 0 // - 14
-12*x = -14 // : -12
x = -14/(-12)
x = 7/6
( 2/3 )
2/3 = 0
x belongs to the empty set
x = 7/6
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