(х+4 9/11 )-5 6/11=1 8/11
(х+4 9/11)-5 6/11=1 8/11 х+4 9/11=1 8/11+5 6/11 х+4 9/11=6 14/11 х=6 14/11-4 9/11 х=2 5/11 Проверка: (2 5/11+4 9/11)-5 6/11=1 8/11 6 14/11-5 6/11=1 8/11 1 8/11=1 8/11