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n in (-oo:+oo)
2/12 = n/66 // - n/66
2/12-(n/66) = 0
1/6-1/66*n = 0 // - 1/6
-1/66*n = -1/6 // : -1/66
n = -1/6/(-1/66)
n = 11
n = 11
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