Alice and Aaron are working as a pair in math class. They decide to each answer the question asked and compare solutions.

Alice: 7^3 x 7^9 = 7^27

Aaron: 7^3 x 7^9 = 7^12

Who has the correct solution and what did the person do that missed it that was incorrect?

Aaron has the correct solution.

Alice misunderstood the rule for multiplying numbers with the same base raised to different exponents. When multiplying numbers with the same base, you add the exponents. So, the correct solution is 7^(3 + 9) = 7^12.