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n in (-oo:+oo)
2*n-(5*n)-3 = 33 // - 33
2*n-(5*n)-33-3 = 0
2*n-5*n-33-3 = 0
-3*n-36 = 0 // + 36
-3*n = 36 // : -3
n = 36/(-3)
n = -12
n = -12
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