\(\boxed{\text{451.}\text{\ }\text{ОК\ ГДЗ\ -\ домашка\ на\ 5}}\)
\[\textbf{а)}\ x \geq 3\]
\(\ \)
\[\textbf{б)}\ y < - 1\]
\[\textbf{в)}\ 1 < x < 4\ \]
\[\textbf{г)} - 3 \leq y \leq 3\]