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n in (-oo:+oo)
11/4 = 2*n+(1/3)*n+1 // - 2*n+(1/3)*n+1
11/4-(2*n)-((1/3)*n)-1 = 0
(-1/3)*n-2*n+11/4-1 = 0
7/4-7/3*n = 0 // - 7/4
-7/3*n = -7/4 // : -7/3
n = -7/4/(-7/3)
n = 3/4
n = 3/4
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