- Undo it on both sides
- Graph the solution
- Test a value, read a graph
- Why a negative flips it
- Flip, or keep it?
- Check with a test value
- Two steps, positive coefficient
- A negative coefficient
- Harder numbers and checking
- From words to symbols
- Solve it and fit the story
- Draining and rounding
- Unlocks after
- Opens up
- The end of this path.