Решите уравнение: x^35/x^42 ·x^29/x^21 =23.

\[\frac{x^{35}}{x^{42}} \cdot \frac{x^{29}}{x^{21}} = 23\]

\[\frac{1}{x^{7}} \cdot x^{8} = 23\]

\[x = 23.\]