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n in (-oo:+oo)
6*(-(6*n)-8) = -12 // + 12
6*(-(6*n)-8)+12 = 0
6*(-6*n-8)+12 = 0
6*(-6*n-8)+12 = 0
-36*n-36 = 0
-36*n-36 = 0
-36*n-36 = 0 // + 36
-36*n = 36 // : -36
n = 36/(-36)
n = -1
n = -1
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