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x in (-oo:+oo)
6*(-x-8) = -36 // + 36
6*(-x-8)+36 = 0
6*(-x-8)+36 = 0
-6*x-12 = 0
-6*x-12 = 0
-6*x-12 = 0 // + 12
-6*x = 12 // : -6
x = 12/(-6)
x = -2
x = -2
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