Can someone help me? It’s number 13 I been trying but I don’t get it :(

Answer:
d=[tex]\frac{1}{2}[/tex]
Step-by-step explanation:
Convert the fractions to have common denominators.
[tex]\frac{5}{6} =\frac{2}{6} +d[/tex].
Now, isolate the "d" variable by doing the opposite operation and subtracting the 2/6 from both sides.
[tex]\frac{5}{6} -\frac{2}{6} =\frac{3}{6}[/tex]
Simply 3/6 and you should get 1/2.