Решение уравнения:
\(x - \frac{8}{15}x = 4 \frac{1}{5}\)
\(\frac{15}{15}x - \frac{8}{15}x = \frac{21}{5}\)
\(\frac{7}{15}x = \frac{21}{5}\)
\(x = \frac{21}{5} : \frac{7}{15}\)
\(x = \frac{21}{5} \cdot \frac{15}{7}\)
\(x = \frac{21 \cdot 15}{5 \cdot 7}\)
\(x = \frac{3 \cdot 7 \cdot 3 \cdot 5}{5 \cdot 7}\)
\(x = 3 \cdot 3 = 9\)
Ответ: \(x = 9\)