Ответы на вопрос:
Сначала 15 + а - 13 = 2 + а а = 5 => 2 + 5 = 7 а = 10 => 2 + 10 = 12 а = 30 => 2 + 30 = 32 b -2 + 18 = b + 16 b = 32; 32 + 16 = 48 b = 43 ; 43 + 16 = 59 b = 52; 52 + 16 = 68
15+a-13 = 15+5-13 = 715+a-13 = 15+10-13 = 12 15+a-13 = 15+ 30-13 = 32 b-2+18 = 32 - 2 + 18 = 48b-2+18 = 43 - 2 + 18 = 53 b-2+18 = 52 - 2 + 18 = 68
1) 4570+1635=6205(ч)- во 2 поселке, 2)4570+6205=10775(ч)- в 1 и 2 вместе, 3)18200-10775=7425(ч)
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