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n in (-oo:+oo)
4-3*n = 41/8 // - 41/8
4-3*n-(41/8) = 0
4-3*n-41/8 = 0
-3*n-9/8 = 0 // + 9/8
-3*n = 9/8 // : -3
n = 9/8/(-3)
n = -3/8
n = -3/8
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