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n in (-oo:+oo)
-n/3 = -2.59 // + 2.59
2.59-n/3 = 0
2.59-1/3*n = 0 // - 2.59
-1/3*n = -2.59 // : -1/3
n = -2.59/(-1/3)
n = 7.77000008
n = 7.77000008
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