Ali and Sara ate 80 small apples combined. Ali ate 4 times more apples than Sara. How many apples did Sara eat? Give me reasons, before answering the question
Let A be the number of apples Ali ate and S be the number of apples Sara ate. We have: A + S = 80 apples. And: A = 4S. Which means: 4S + S = 80. So: 5S = 80. So the number of apples Sara ate is: S = 80 / 5 = 16 apples. So the final answer is 16.