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x in (-oo:+oo)
(1/6)*(12-(6*x)) = 5*(x+4) // - 5*(x+4)
(1/6)*(12-(6*x))-(5*(x+4)) = 0
(1/6)*(12-6*x)-5*(x+4) = 0
1/6*(12-6*x)-5*(x+4) = 0
1/6*(12-6*x)-5*(x+4) = 0
-6*x-18 = 0
-6*x-18 = 0
-6*x-18 = 0 // + 18
-6*x = 18 // : -6
x = 18/(-6)
x = -3
x = -3
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