Math practice · reimagined
Equations
Turn Equations into a fight you actually want to win. Every problem is an attack — solve it faster than your opponent and you land the hit.
Ages 4–99+ · no download · plays in your browser · 23 languages
How it works
Equations
Pick a fighter, choose Equations, and trust your numbers. The faster and cleaner you solve, the harder you hit — from gentle early grades all the way to Olympic-level challenges.
An equation is a balance scale: whatever's on the left weighs the same as the right. The x is a mystery number, and your job is to get it alone.
For x + 4 = 11, undo the +4 by subtracting 4 from BOTH sides → x = 7. Whatever you do to one side, do to the other so the scale stays level.
Type the value of x.
Every level of Equations
- T1x + a = bGrade 6 · 11 yrsSolve for x.Play free ▸
- T2ax + b = cGrade 7 · 12 yrsSolve for x, integer answer.Play free ▸
- T3ax + b = cx + dGrade 8 · 13 yrsSolve for x, integer answer.Play free ▸
- T4x² = kGrade 8 · 13 yrsQuadratic — type the positive root.Play free ▸
- T5(x ± a)² = 0Grade 9 · 14 yrsPerfect-square quadratic — one root.Play free ▸
- T6Evaluate a functionGrade 8 · 13 yrsSubstitute x into f(x).Play free ▸
- T7DiscriminantGrade 9 · 14 yrsb² − 4acPlay free ▸
- T8Vertex of a parabolaGrade 9 · 14 yrsx = −b / (2a)Play free ▸
- T9Absolute value equationGrade 9 · 14 yrsx + b = c or x + b = −cPlay free ▸
— Quick answers —
Equations: the short FAQ
- Is Equations free to play?
- Yes. Equations is free to play right in your browser — the whole curriculum, no download, no signup. Paid plans later unlock the full fighter roster, every stage and saved progress.
- Who is Equations for?
- Anyone from 4 to 99+. The early grades stay gentle for beginners, while the higher tiers will make even the confident sweat.
- Do I need to download anything to play Equations?
- Nope. Equations runs in any browser, on a laptop, tablet or phone.
- Can Equations be used in the classroom?
- Absolutely. Teachers run Equations with a whole class and track who's improving — see the schools plan for per-student pricing and a teacher dashboard.