# How do you find the slope given 5x+8y=9?

I found : $- \frac{5}{8}$
An easy way is to write it in slope-intercept form by isolating $y$ on one side as:
$y = - \frac{5}{8} x + \frac{9}{8}$
The slope will be the coefficient of $x$, i.e., $- \frac{5}{8}$.