Давай решим этот пример по шагам.
\[ \frac{1}{6} + \frac{7}{12} = \frac{2}{12} + \frac{7}{12} = \frac{9}{12} = \frac{3}{4} \)
\[ 5 \times \frac{3}{4} = \frac{15}{4} \)
\[ 13 - \frac{15}{4} = \frac{52}{4} - \frac{15}{4} = \frac{37}{4} \)
\[ \frac{37}{4} - \frac{5}{8} = \frac{74}{8} - \frac{5}{8} = \frac{69}{8} \)
\[ \frac{69}{8} = 8 \frac{5}{8} \)
Ответ: 8 rac{5}{8}