Hey there!☺
[tex]Answer:\boxed{a<\frac{-1}{6}}[/tex]
[tex]Explanation:[/tex]
[tex]a+\frac{5}{6}<\frac{2}{3}[/tex]
We only have one step in this inequality which is subtract 5/6 from both sides:
[tex]a+\frac{5}{6}-\frac{5}{6}<\frac{2}{3}-\frac{5}{6}\\a<\frac{-1}{6}[/tex]
[tex]a<\frac{-1}{6}[/tex] is our answer.
Hope this helps!☺