\[ \frac{4x \cdot 6}{3 \cdot 6} - \frac{x}{18} = 63 \]
\[ \frac{24x}{18} - \frac{x}{18} = 63 \]
\[ \frac{24x - x}{18} = 63 \]
\[ \frac{23x}{18} = 63 \]
\[ 23x = 63 \cdot 18 \]
\[ 23x = 1134 \]
\[ x = \frac{1134}{23} \]
Ответ: x = \(\frac{1134}{23}\).