Hi!
[tex]\frac{5}{6}=\frac{1}{6}+d[/tex]
[tex]\frac{1}{6}+d=\frac{5}{6}[/tex]
[tex]\frac{1}{6}+d-\frac{1}{6}=\frac{5}{6}-\frac{1}{6}[/tex]
[tex]d=\frac{2}{3}[/tex]
Explanation: First you had to switch sides on your math problems. It gave us 1/6+d=5/6. Then you can also subtract 1/6 from both sides. Then it gave us 1/6+d-1/6=5/6-1/6. And you can simplify and it gave us d=2/3 is the right answer. Hope this helps! And thank you for posting your question at here on Brainly. And have a great day. -Charlie