Решение:
\[ x = \frac{x}{7} + 126 \]
\[ x - \frac{x}{7} = 126 \]
\[ \frac{7x}{7} - \frac{x}{7} = 126 \]
\[ \frac{6x}{7} = 126 \]
\[ x = 126 \times \frac{7}{6} \]
\[ x = \frac{126}{6} \times 7 \]
\[ x = 21 \times 7 \]
\[ x = 147 \]
Ответ: 147