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x in (-oo:+oo)
(1/3)*(12-(6*x)) = 5*(x+4) // - 5*(x+4)
(1/3)*(12-(6*x))-(5*(x+4)) = 0
(1/3)*(12-6*x)-5*(x+4) = 0
1/3*(12-6*x)-5*(x+4) = 0
1/3*(12-6*x)-5*(x+4) = 0
-7*x-16 = 0
-7*x-16 = 0
-7*x-16 = 0 // + 16
-7*x = 16 // : -7
x = 16/(-7)
x = -16/7
x = -16/7
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