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n in (-oo:+oo)
29/9 = 4*n+n-(2/3) // - 4*n+n-(2/3)
29/9-(4*n)-n+2/3 = 0
29/9-4*n-n+2/3 = 0
35/9-5*n = 0 // - 35/9
-5*n = -35/9 // : -5
n = -35/9/(-5)
n = 7/9
n = 7/9
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