$$\left. \begin{array} { l } { 47 = x ^ { 3 } - 92 - 5 x + 3 } \\ { \text \right.$$
$x = \frac{\sqrt[3]{3} {(\sqrt[3]{\sqrt{374169} + 612} + \sqrt[3]{612 - \sqrt{374169}})}}{3} \approx 5.46625362$
