I can understand how this sounds confusing so we will go piece by piece. The word "sum" means addition so we will be adding two things together. The first part of the equation that they give you is "2 times a number, x"
so now we know we are adding "2x" and something else. The next part they give you is 6. So now we know our equation starts with 2x + 6. Next, they give you the symbol. When a problem says "is more than" or "is less than" we know we will be using an inequality symbol (< or >). This problem says "is more than" so we will be using the > symbol. Now we know our equation is 2x + 6 > but we still need a number at the end. The problem says 40.
Our final equation is 2x + 6 > 40