Hi! I'm assuming the x/2 is a fraction in which case the answer is 54.
To find this you have to first add 8 to both sides of the equal sign (becuase the 8 is negative and to simplify you do the opposite of what the sign is, e.g. add a negative number to both sides or subtract a positive one), this gives you the equation x/2 = 27.
Then because x is divided by 2 in the fraction you multiply it and 27 by 2 to get 54.
Hope this helps :)