§ Задание 369
\[\boxed{\text{4.\ 369}}\]
\[\textbf{а)}\ a + 9 - a - 13 = - 4\ \]
\[\textbf{б)} - n - m + 29 + m - 29 = - n\]
\[\textbf{в)}\ x - n + 5 - 11 + n = x - 6\]

\[= 11,4 - 9,4 = 2\ \]
\[\boxed{\text{4.\ 369}}\]
\[\textbf{а)}\ a + 9 - a - 13 = - 4\ \]
\[\textbf{б)} - n - m + 29 + m - 29 = - n\]
\[\textbf{в)}\ x - n + 5 - 11 + n = x - 6\]

\[= 11,4 - 9,4 = 2\ \]