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n in (-oo:+oo)
4-3*n = 4*n-73 // - 4*n-73
4-3*n-(4*n)+73 = 0
4-3*n-4*n+73 = 0
77-7*n = 0 // - 77
-7*n = -77 // : -7
n = -77/(-7)
n = 11
n = 11
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