Algebra: A Combined Approach (4th Edition)

x = $-\frac{1}{6}$
$\frac{5}{6} + x = \frac{2}{3}$ Subtract $\frac{5}{6}$ from both sides: x = $\frac{2}{3} - \frac{5}{6}$ x = $\frac{4}{6} - \frac{5}{6}$ x = $-\frac{1}{6}$