7/13 * (26/21 + х) - 28/54 : 14/27 = - 11/117
7/13 * (26/21 + х) - 28/54 * 27/14 = - 11/117
7/13 * (26/21 + х) - 1 = - 11/117
7/13 * (26/21 + х) = - 11/117 + 1 = (117-11)/117 = 106/117
26/21 + х = 106/117 : 7/13 = 106/117 * 13/7 = 106/63
<span>х = 26/21 - 106/63 = (78-106)/63 = -28/63 = -4/9</span>
1) 3*(317-4х)=627
951-12х=627
951-627=12х
324=12х
х=27
2)23х-19х+3х=35
7х=35
х=5
7*3=21
21+2=23(с) - в колонне.
Ответ: 23 солдата.