Finding Unknowns

Equations with Unknowns

Building Expressions

Working with Unknowns

Finding Solutions

Solving Multiple Equations

Rewriting Equations

Isolating Unknowns

Solving an Equation

Substitution

Groups in Equations

Working with Groups

Solving with Groups

Unpacking Boxes

Distributing

Packing Boxes

Factoring

Strategic Moves

Combining Like Terms

Combining in Equations

Rearranging Terms

Rearranging Terms in Equations

Combining and Solving

Grouping to Solve

Unbalanced Scales

Inequalities Both Ways

Balancing Scales

Solutions to Inequalities

Graphing Inequalities

Graphing Solutions

Finding the Boundary

Solving Inequalities

Including the Boundary

Writing Inequalities

Negations

Putting It All Together

Systems with Scales

Balancing with Substitution

Writing Systems of Equations

Substituting Groups

Isolating and Substituting

Substitution Strategy

Subtracting Scales

Elimination

Multiplying to Eliminate

Balancing with Variables

Balancing with Constants

Balancing with Two Variables

Balancing with Equations

Balancing with Unknown Weights

Building Tilted Scales

Reasoning about Weights

More Reasoning about Weights

Strategic Comparisons

Reasoning about Two Scales

Reasoning with Equations

Unpacking Boxes

Packing Boxes

Reasoning about Unpacking

Reasoning about Packing Boxes

Reasoning about Multiples

Constraints

More Constraints

Reasoning with Balanced Scales

Reasoning with Weighted Scales

Reasoning with Scale Systems

Constraints in Scale Systems