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Excel in math and science
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Excel in math and science
Master concepts by solving fun, challenging problems.
It's hard to learn from lectures and videos
Learn more effectively through short, interactive explorations.
Used and loved by over 6 million people
Learn from a vibrant community of students and enthusiasts,
including olympiad champions, researchers, and professionals.
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Algebra
Solving Equations
Intro
Concept Quizzes
Warmup
Balanced Scales
Setting Up Equations
Simple Equations
Multi-Step Equations
Isolating a Variable
Solve by Substitution
Solve by Elimination
Challenge Quizzes
Level 1
Level 2
Balances Warmup
How many red squares should be placed on the right side of the bottom scale in order to make it balance?
4
6
8
9
12
Submit
How many red squares should be placed on the right side of the bottom scale in order to make it balance?
3
4
5
6
8
Submit
What should be placed on the right side of the bottom scale in order to make it balance?
4 Yellow Triangles
5 Yellow Triangles
24 Blue Circles
25 Blue Circles
Submit
What should be placed on the right side of the bottom scale in order to make it balance?
3 Green Pentagons
4 Green Pentagons
4 Yellow Triangles
5 Yellow Triangles
Submit
How many blue circles should be placed on the right side of the lower scale to make it balance?
1
2
3
6
8
Submit
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