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n in (-oo:+oo)
4*(6*n+6) = 144 // - 144
4*(6*n+6)-144 = 0
4*(6*n+6)-144 = 0
24*n-120 = 0
24*n-120 = 0
24*n-120 = 0 // + 120
24*n = 120 // : 24
n = 120/24
n = 5
n = 5
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