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x in (-oo:+oo)
(1/2)*(12-(8*x)) = x-(11*x) // - x-(11*x)
(1/2)*(12-(8*x))-x+11*x = 0
(1/2)*(12-8*x)-x+11*x = 0
1/2*(12-8*x)-x+11*x = 0
1/2*(12-8*x)-x+11*x = 0
11*x-5*x+6 = 0
6*x+6 = 0
6*x+6 = 0
6*x+6 = 0 // - 6
6*x = -6 // : 6
x = -6/6
x = -1
x = -1
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