1. Let's define variables for the number of cookies baked by Elsa and Anna. Let $A$ be the number of cookies Anna baked. Let $E$ be the number of cookies Elsa baked. 2. According to the problem, Elsa baked 3 times as many cookies as Anna. This can be written as: $$E = 3A$$ 3. This equation shows the relationship between the number of cookies baked by Elsa and Anna. If you want to find the exact number of cookies Elsa baked, you need to know how many Anna baked. Otherwise, the answer is the expression $E = 3A$ which means Elsa baked three times the amount Anna baked.