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n in (-oo:+oo)
2-n-3/2 = (5*n)/2-5 // - (5*n)/2-5
2-n-((5*n)/2)-3/2+5 = 0
(-5/2)*n-n-3/2+2+5 = 0
11/2-7/2*n = 0 // - 11/2
-7/2*n = -11/2 // : -7/2
n = -11/2/(-7/2)
n = 11/7
n = 11/7
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