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n in (-oo:+oo)
6*(7-(6*n)) = 330 // - 330
6*(7-(6*n))-330 = 0
6*(7-6*n)-330 = 0
6*(7-6*n)-330 = 0
-36*n-288 = 0
-36*n-288 = 0
-36*n-288 = 0 // + 288
-36*n = 288 // : -36
n = 288/(-36)
n = -8
n = -8
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