Interactive applet
Solving Equations
Balance a linear equation one inverse operation at a time. See when you get one, none, or infinitely many solutions.
Hands-on lab
Balance scale
3x + 4 = 19
- 1. Subtract 4 from both sides: 3x = 15
- 2. Divide by 3: x = 5
Missions
- Solve so x = 5
- Build 0 = 0 (infinitely many)
- Build a contradiction (no solution)
0/3 complete
Guided questions
Undo addition before you undo multiplication. Why is that order helpful?
Reflection
How do you know when a linear equation has no solution?
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