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n in (-oo:+oo)
(1/3)*n+2 = 3*n+38/9 // - 3*n+38/9
(1/3)*n-(3*n)-(38/9)+2 = 0
(1/3)*n-3*n-38/9+2 = 0
-8/3*n-20/9 = 0 // + 20/9
-8/3*n = 20/9 // : -8/3
n = 20/9/(-8/3)
n = -5/6
n = -5/6
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