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n in (-oo:+oo)
6*(1*n-8) = 12 // - 12
6*(1*n-8)-12 = 0
6*(n-8)-12 = 0
6*(n-8)-12 = 0
6*n-60 = 0
6*n-60 = 0
6*n-60 = 0 // + 60
6*n = 60 // : 6
n = 60/6
n = 10
n = 10
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