\[\begin{cases} \log_{\frac{1}{7}} x^2 \geq \log_{\frac{1}{7}} 34,3 - \log_{\frac{1}{7}} 0,7 \\ \log_4 (4x - 1) \gt 0 \end{cases}\]

\[x \in \square \square; \square \square\]