If you're seeing this message, it means we're having trouble loading external resources for Khan Academy.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

Solutions to linear equations

3 videos
1 skill
Not all equations in one variable have exactly one solution. Some have no solutions and some are true for any value of the unknown. In this tutorial, we'll learn to tell the difference (and understand why this is). Common Core Standard: 8.EE.C.7a