1. **State the problem:** Find the slope of the line given by the equation $y + 8x = 12$. 2. **Rewrite the equation in slope-intercept form:** The slope-intercept form is $y = mx + b$, where $m$ is the slope. 3. **Isolate $y$:** $$y + 8x = 12$$ $$y = 12 - 8x$$ 4. **Rewrite to identify the slope:** $$y = -8x + 12$$ 5. **Identify the slope:** The coefficient of $x$ is the slope, so $$m = -8$$ **Final answer:** The slope of the line is **-8**.