Решение:
\[ x = \frac{7}{8} - \frac{1}{2} \]
\[ x = \frac{7}{8} - \frac{1 \times 4}{2 \times 4} \]
\[ x = \frac{7}{8} - \frac{4}{8} \]
\[ x = \frac{7-4}{8} = \frac{3}{8} \]
Ответ: x = \(\frac{3}{8}\)