-3 1/8x + 3 = -1/8x - 6

- 3 \frac{1}{8} x + 3 = - \frac{1}{8} x - 6 \\ - 3 \frac{1}{8} x + \frac{1}{8} x = - 6 - 3 \\ - 3x = - 9 \\3 x = 9 \\ x = 9 \div 3 \\ x = 3