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n in (-oo:+oo)
6.8/17 = n/3.4 // - n/3.4
6.8/17-(n/3.4) = 0
6.8/17-0.29411765*n = 0
0.4-0.29411765*n = 0 // - 0.4
-0.29411765*n = -0.4 // : -0.29411765
n = -0.4/(-0.29411765)
n = 1.35999999
n = 1.35999999
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