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n in (-oo:+oo)
8*n-(7/4) = -1 // + 1
8*n-(7/4)+1 = 0
8*n-7/4+1 = 0
8*n-3/4 = 0 // + 3/4
8*n = 3/4 // : 8
n = 3/4/8
n = 3/32
n = 3/32
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