If you have ever done grocery shopping and bought more than one item, you've done algebra.

it's the first math you learn at school.

If Jimmy has 8 oranges and Sally has 5 apples how many fruit does Jimmy and Sally have together?

Or the question about the guy that buys 50 watermelons at a time for $1.05 each etc.

We've all seen those "the guy from the math problem memes"

Algebra is the math that you actually use in real life.