\[\boxed{\mathbf{789\ (}\mathbf{с}\mathbf{)}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1)\ m > \frac{34}{6}\text{\ \ }при\ m = 6;\ \ \]
\[так\ как\ \ \frac{34}{6} = 5\frac{4}{6}.\]
\[2)\ \frac{421}{16} < m\ \ \ при\ m = 27;\ \ \]
\[так\ как\ \ \frac{421}{16} = 26\frac{5}{16}.\]
\[\boxed{\ \mathbf{789}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1)\ 6x + 8x - 7x = 714\]
\[7x = 714\]
\[x = 714\ :7\]
\[x = 102\]
\[Ответ:102.\]
\[2)\ 11x - 6x + 17 = 2042\]
\[5x = 2042 - 17\]
\[5x = 2025\]
\[x = 405\]
\[Ответ:405.\]