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n in (-oo:+oo)
(2/3)*n-n+3/10 = 119/30 // - 119/30
(2/3)*n-n+3/10-(119/30) = 0
(2/3)*n-n+3/10-119/30 = 0
-1/3*n-11/3 = 0 // + 11/3
-1/3*n = 11/3 // : -1/3
n = 11/3/(-1/3)
n = -11
n = -11
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