05:42 duration 5 minutes 42 seconds
Identifying solutions to a system of linear…
Identifying solutions to a system of linear equations
This demonstrates testing possible answers to a system of two equations to see whether they are truly answers or not. Note that each answer has to work for both equations, but if it doesn't…
01:48 duration 1 minute 48 seconds
Identifying solutions to a two-step linear…
Identifying solutions to a two-step linear inequality in one variable
Demonstrating how to substitute several values for the variable in an inequality to see if they are valid solutions.