Me solve this: 6 1/3 + k + 3 5/6 + 5 1/2 = 26 1/6

6 1/3 + k + 3 5/6 + 5 1/2 = 26 1/6 
Add your fractions 
6 1/3 + 3 5/6 + 5 1/2 = 15 2/3
now You need to isolate k on one side of the equation by using the subtraction method of equality.
k + 15 2/3 = 26 1/6
k = 10 1/2 

Hope this helps

I had to edit

6 1/3 + k +3 5/6 + 5 1/2 =26 1/6

First I made all the denominators 6:
6 2/6 + k + 3 5/6 + 5 3/6 =26 1/6

-6 2/6 from each side:
k+3 5/6 + 5 3/6 =19 5/6

- 3 5/6 from each side:
k+5 3/6=16

-5 3/6 from each side:
k=10 3/6

simplify:
k=10 1/2

Hope this helps :)

Sorry i meant b in the other question