\[\boxed{Страница\ 17.}\]
\[\boxed{\mathbf{1.}}\]
\[\textbf{а)}\ x \leq 4\]
\[\textbf{б)}\ x \geq 4\]
\[\boxed{\mathbf{2.}}\]
\[\textbf{а)}\ 0 \leq 7\]
\[0\ меньше\ или\ равен\ 7 \Longrightarrow да.\ \]
\[\textbf{б)}\ 36 \leq 34\]
\[36\ меньше\ или\ равно\ 34 \Longrightarrow нет.\]
\[\textbf{в)}\ 10 \geq 8\]
\[10\ больше\ или\ равно\ 8 \Longrightarrow да.\]
\[\textbf{г)}\ 5 \geq 23\]
\[5\ больше\ или\ равно\ 23 \Longrightarrow нет.\]
\[\boxed{\mathbf{3.}}\]
\[\textbf{а)}\ 9 \geq 2;\ \ \ так\ как\ 9 > 2\]
\[\textbf{б)}\ 4 \leq 6;\ \ \ так\ как\ 4 < 6\]
\[\textbf{в)}\ 8 \leq 8;\ \ \ так\ как\ 8 = 8\]
\[\textbf{г)}\ 3 \geq 3;\ \ \ так\ как\ 3 = 3\]
\[\boxed{\mathbf{4.}}\]
\[\textbf{а)}\ x \geq 3\]
\[x = \left\{ 3;4;5;\ldots \right\}.\]
\[\textbf{б)}\ x \leq 3\]
\[x = \left\{ 0;1;2;3 \right\}.\]
\[\boxed{\mathbf{5.}}\]
\[y < 8\]
\[y = \left\{ 0;1;2;3;4;5;6;7 \right\}.\]
\[Такое\ же\ решение\ имеет\ \]
\[неравенство\ y \leq 7.\]
\[\boxed{\mathbf{6.}}\]
\[\textbf{а)}\ 111 \cdot x \leq 555\]
\[x = \left\{ 1;2;3;4;5 \right\}.\]
\[\textbf{б)}\ 347 \cdot y \leq 1388\]
\[y = \left\{ 1;2;3;4 \right\}.\]
\[\textbf{в)}\ 201 \cdot z < 603\]
\[z = \left\{ 1;2 \right\}.\]