\[\boxed{\text{Страница}\text{\ 30.}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[87.\]
\[1)\ x - 5 < 4\]
\[x = 5;6;7;8.\]
\[2)\ 12\ :x < 10\]
\[x = 2;3;4;6;12.\]
\[88.\]
\[89.\]
\[BC\ и\ AK;\]
\[XM\ и\ AK;\]
\[DO\ и\ \ BC.\]