9-1 The Graphing Method: To use graphs to solve systems of linear equations.

9-2 The Substitution Method: To use the substitution method to solve systems of linear equations.

9-3 Solving Problems with Two Variables: To use systems of linear equations in two variables to solve problems.

9-4 The Addition-or-Subtraction Method: To use addition or subtraction to solve systems of linear equations in two variables.

9-5 Multiplication with the Addition-or-Subtraction Method: To use multiplication with the addition-or-subtraction method to solve linear equations.

9-6 Wind and Water Current Problems: To use systems of equations to solve wind and water current problems.

9-7 Puzzle Problems: To use systems of equations to solve digit, age, and fraction problems.