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n in (-oo:+oo)
(3/8)*n = 3.3 // - 3.3
(3/8)*n-3.3 = 0
3/8*n-3.3 = 0 // + 3.3
3/8*n = 3.3 // : 3/8
n = 3.3/3/8
n = 8.8
n = 8.8
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