New York State Learning Standards and Core Curriculum
NY-6.EE. Expressions, Equations and Inequalities
Apply and extend previous understandings of arithmetic to algebraic expressions.
NY-6.EE.3. Apply the properties of operations to generate equivalent expressions.
Reason about and solve one-variable equations and inequalities.
NY-6.EE.5. Understand solving an equation or inequality as a process of answering a question: which values from a specified set, if any, make the equation or inequality true? Use substitution to determine whether a given number in a specified set makes an equation or inequality true.