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(-1/2)*(6*x-4) = 0
-1/2*(6*x-4) = 0
( -1/2 )
-1/2 = 0
x belongs to the empty set
( 6*x-4 )
6*x-4 = 0 // + 4
6*x = 4 // : 6
x = 4/6
x = 2/3
x = 2/3
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