\[\boxed{\ \mathbf{615\ (}\mathbf{н}\mathbf{)}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1)\ 6x + 8x - 7x = 714\]
\[7x = 714\]
\[x = 714\ :7\]
\[x = 102\]
\[Ответ:102.\]
\[2)\ 11x - 6x + 17 = 2042\]
\[5x = 2042 - 17\]
\[5x = 2025\]
\[x = 405\]
\[Ответ:405.\]
\[\boxed{\mathbf{615}.\ }\]
\[25 < x < 60\]
\[x = 30;36;42;48;54.\]