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x in (-oo:+oo)
(1/2)*(8*x+5)-((2/3)*(6*x+12)) = 0
(1/2)*(8*x+5)+(-2/3)*(6*x+12) = 0
1/2*(8*x+5)-2/3*(6*x+12) = 0
1/2*(8*x+5)-2/3*(6*x+12) = 0
-11/2 = 0
-11/2 = 0
-11/2 = 0 // * 2
-11 = 0
x belongs to the empty set
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