\[ \frac{6}{13}z = \frac{1}{16} + \frac{1}{5} \]
\[ \frac{6}{13}z = \frac{5}{80} + \frac{16}{80} \]
\[ \frac{6}{13}z = \frac{21}{80} \]
\[ z = \frac{21}{80} : \frac{6}{13} \]
\[ z = \frac{21}{80} \times \frac{13}{6} \]
\[ z = \frac{7}{80} \times \frac{13}{2} \]
\[ z = \frac{91}{160} \]
Ответ: z = 91/160