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x in (-oo:+oo)
(4/3)*(-x-6) = 8 // - 8
(4/3)*(-x-6)-8 = 0
4/3*(-x-6)-8 = 0
4/3*(-x-6)-8 = 0
-4/3*x-16 = 0
-4/3*x-16 = 0
-4/3*x-16 = 0 // + 16
-4/3*x = 16 // : -4/3
x = 16/(-4/3)
x = -12
x = -12
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