In this unit, students expand and deepen theirprior understanding of expressions, equations, and inequalities. Studentsreason about equations,inequalities, and systems of equations and inequalitiesas ways to represent constraints, and they reason about the process of solving equations and inequalities in terms of finding values that satisfy those constraints. The process of finding solutions may involverewriting and manipulating equations. Students learn to explain and validate the steps to do so. Throughout the unit, students practice reasoning about situations and mathematical representations, interpreting expressions and numbers in context, and using mathematical tools to model quantities and relationships.
