e) \( \frac{5}{8}x + x - \frac{3}{4}x = 1\frac{3}{4} \)

Решение:

1. \( \frac{5}{8}x + \frac{8}{8}x - \frac{6}{8}x = \frac{7}{4} \)
2. \( \frac{5+8-6}{8}x = \frac{7}{4} \)
3. \( \frac{7}{8}x = \frac{7}{4} \)
4. \( x = \frac{7}{4} \cdot \frac{8}{7} \)
5. \( x = 2 \)

Ответ: \( x = 2 \).