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n in (-oo:+oo)
n/8 = 2.6/13 // - 2.6/13
n/8-(2.6/13) = 0
n/8-0.2 = 0
1/8*n-0.2 = 0 // + 0.2
1/8*n = 0.2 // : 1/8
n = 0.2/1/8
n = 1.6
n = 1.6
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