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n in (-oo:+oo)
2*n-(5*n)-2 = 16 // - 16
2*n-(5*n)-16-2 = 0
2*n-5*n-16-2 = 0
-3*n-18 = 0 // + 18
-3*n = 18 // : -3
n = 18/(-3)
n = -6
n = -6
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