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x in (-oo:+oo)
(1/3)*(-6*x-11) = 0
1/3*(-6*x-11) = 0
( -6*x-11 )
-6*x-11 = 0 // + 11
-6*x = 11 // : -6
x = 11/(-6)
x = -11/6
( 1/3 )
1/3 = 0
x belongs to the empty set
x = -11/6
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