Q: You are provided with an arithmetic question. Your task is to compute the solution using the given arithmetic operations. The only arithmetic operators needed to answer the questions are'+'(addition) and'-'(subtraction). The answer should be correct to one decimal place.
Keith found 6 seashells, Jessica found 8 seashells, and Tim found 7seashells on the beach. When they cleaned them, they discoveredthat 3 were cracked. How many seashells did they find together?
A:
21.0