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n in (-oo:+oo)
6*n-(3/5) = 267/5 // - 267/5
6*n-(3/5)-(267/5) = 0
6*n-3/5-267/5 = 0
6*n-54 = 0 // + 54
6*n = 54 // : 6
n = 54/6
n = 9
n = 9
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