1. The problem is to simplify the expression $A + A$. 2. According to the algebraic rule of combining like terms, when you add a term to itself, you multiply it by 2. 3. So, $A + A = 2A$. 4. This means that adding $A$ to itself is the same as multiplying $A$ by 2. 5. Therefore, the simplified form of $A + A$ is $2A$.