\[\boxed{\text{4.\ 203}}\]
\[\textbf{а)} - 3 + c = 13\]
\[c = 16.\]
\[Проверка:\]
\[- 3 + 16 = 13\]
\[13 = 13.\]
\[\textbf{б)}\ z + ( - 4) = - 22\]
\[z = - 18.\]
\[Проверка:\]
\[- 18 + ( - 4) = - 22\]
\[- 22 = - 22.\]
\[\textbf{в)}\ 4 + q = - 20\]
\[q = - 24.\]
\[Проверка:\]
\[4 + ( - 24) = - 20\]
\[- 20 = - 20.\]
\[\textbf{г)}\ p + ( - 24) = 4\]
\[p = 28.\]
\[{Проверка: }{28 + ( - 24) = 4}\]
\[4 = 4.\]