12 not sure if it's true or not.
The answer is that s = 55/42.
Here's how to solve it
The answer equals to 13 1/20 or in decimal form 13.05
Convert the 1/2 to a number that has a 16 in the denominator
because you can only add or subtract numbers that have the same denominator
so 1/2 = 8/16
the 8 + 5 = 13
so 8/16 + 5/16 = 13/16
therefore your answer is 13/16