Generally a lot of the formalism of Algebra requires specific brain development milestones dealing with abstraction to be reached. That’s why it is taught at t

Generally a lot of the formalism of Algebra requires specific brain development milestones dealing with abstraction to be reached. That’s why it is taught at the end of middle school. Now could some concepts be introduced earlier? Yes a common exercise in elementary school is to solve questions in the form of 7 + _ = 15. In this case x is replaced with a _ because variables are hard to grasp.