Answer:
[tex] \frac{x}{8} - \frac{1}{2} = \frac{ - 7}{2} \\ \frac{x}{8} = \frac{1}{2} - \frac{7}{2} \\ \frac{x}{8} = \frac{(1 - 7)}{2} \\ \frac{x}{8} = \frac{ - 6}{2} \\ \frac{x}{8} = - 3 \\x = 8 \times ( - 3) \\ \boxed{x = - 18}[/tex]