5+(3x3-3) / 2 =

always remember E.M.D.A.S. = Exponents, Multiplication, Division, Addition, Subtraction. this the order of which operation must be done first.

here, of course we start with the operation inside the parenthesis:
5+(3x3-3)/2
5 + (9-3)/2
5 + 6/2
5 + 3
8

hope this helps~ :)