Missouri Learning Standards
MO.6.EEI. Expressions, Equations and Inequalities
6.EEI.B. Reason about and solve one-variable equations and inequalities.
6.EEI.B.4. Use substitution to determine whether a given number in a specified set makes a one-variable equation or inequality true.
6.EEI.B.5. Understand that if any solutions exist, the solution set for an equation or inequality consists of values that make the equation or inequality true.
6.EEI.B.6. Write and solve equations using variables to represent quantities, and understand the meaning of the variable in the context of the situation.
6.EEI.B.7. Solve one-step linear equations in one variable involving non-negative rational numbers.