Answer:
3/6 or if you prefer simplified version it is 1/2
Step-by-step explanation:
1/3=2/6
2/6+3/6=5/6
d = 1/2
5/6 = 1/3 + d
~Find common denominators
5/6 = 2/6 + d
~Subtract 2/6 to both sides
3/6 = d
~Simplify
1/2 = d
Best of Luck!
