\[\boxed{\ \mathbf{923\ (922)}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1)\ 12,6\ ч \cdot 26,\ 5\ \frac{км}{ч} =\]
\[= 333,9\ (км) - прошла\ \]
\[за\ первый\ день.\]
\[3)\ 333,9 + 298,2 = 632,1\ (км) -\]
\[преодолела\ яхта\ за\ два\ дня.\]
\[Ответ:632,1\ км.\]
\[\boxed{\mathbf{923}\mathbf{\ (779)}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1)\ x + 4\frac{4}{19} = 6\frac{2}{19}\]
\[x = 6\frac{2}{19} - 4\frac{4}{19}\]
\[x = 5\frac{21}{19} - 4\frac{4}{19}\]
\[x = 1\frac{17}{19}\]
\[Ответ:1\frac{17}{19}.\]
\[2)\ 25 - x = 8\frac{3}{14}\]
\[x = 25 - 8\frac{3}{14}\]
\[x = 24\frac{14}{14} - 8\frac{3}{14}\]
\[x = 16\frac{11}{14}\]
\[Ответ:16\frac{11}{14}.\]
\[3)\ 32 - x = 9\frac{18}{35}\]
\[x = 32 - 9\frac{18}{35}\]
\[x = 31\frac{35}{35} - 9\frac{18}{35}\]
\[x = 22\frac{17}{35}\]
\[Ответ:22\frac{17}{35}.\]