In a series of practice problems, learners use the addition or subtraction method to solve systems of linear equations, also called "simultaneous linear equations."
Ratios and Proportions
By Allen Reed, Douglas Jensen
In this interactive object, learners simplify ratios and solve problems using proportions. All terms are defined.
Gear Ratio Concepts (Screencast)
By James Bourassa
In this screencast, learners examine the concept of gear ratios. The number of teeth, diameters, and velocity relationships are discussed and calculated using linear ratio equations.
By Terry Lark
In this learning activity you'll walk through a direct variation problem.
Solving Systems of Linear Equations Using the Substitution Method
In a series of practice problems, learners use the substitution method to solve systems of linear equations, also called "simultaneous linear equations."
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