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N in (-oo:+oo)
(1/9)*N-4.8 = 6.2 // - 6.2
(1/9)*N-6.2-4.8 = 0
1/9*N-11 = 0 // + 11
1/9*N = 11 // : 1/9
N = 11/1/9
N = 99
N = 99
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