Ali and Sara ate 80 small apples combined. Ali ate 4 times more apples than Sara. How many apples did Sara eat?
Please answer and provide answer explanation.
16
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.

.

The final answer: 16