Explanation:
a/(2) + 1 = a Multiply thru by '2' to get
a + 2 = 2a Subtract 'a' from both sides of the equation
2 = a
then (12 + a) /(6 + 1) = 14/7= 2 Possibly...
....you didn't include parentheses anywhere in your post ....so I assumed where they might be to get a reasonable answer
Here is the answer for what is actually posted :
a/2 + 1 = a shows a = 2 as before
12 + 2/ 6 + 1 = 12 + 1/3 + 1 = 13 1/3