Algebra Solve X is a free online algebra game that runs in the browser with no download and no account. An equation appears — 3x + 4 = 19 — and the only thing you can do is choose an operation. Take 4 off both sides, and both sides visibly lose 4. Divide both sides by 3, and every term is divided. The equation transforms in front of you, line by line, until it reads x = 5. That is the whole method of solving equations, and it is the part a quiz that asks you to type the value of x skips over completely. Every operation on offer keeps the answer the same, which is what makes the method legitimate rather than a trick, and the test suite verifies exactly that for every equation the game can produce. Nothing ever turns into a fraction: division is only offered when the number goes exactly into every term. There is no clock — each equation has a par worked out by searching for the shortest solution, and you are scored on how close to it you get. Twelve levels run from one-step equations up to x on both sides with negative answers.
How to play Algebra Solve X
- An equation appears at the bottom of the working area, with the operations you can use underneath.
- Tap an operation. It is applied to both sides at once and the new equation is added to the working, annotated with the step you just took.
- Keep going until the equation reads x on its own — that is solved, and the answer is on the right.
- The usual order is: get the x terms onto one side, then get the number away from x, then divide by what is left in front of x.
- Division is only ever offered when the number goes exactly into every term, so nothing turns into a fraction.
- Some of the operations offered are legal but useless. Nothing breaks if you take one — it just costs you a move, and the note underneath says so.
- Undo steps back up the working as far as you like. There is no clock anywhere.
- Each equation has a par: the fewest moves that could solve it. Clear the level's quota, and solving them all at par is three stars.
Tips
- Deal with x on both sides first. Until there is only one x term, dividing achieves nothing.
- Then clear the number next to x, and divide last. Dividing before the constant is gone is what forces fractions in written work.
- Read what the operation would do before you tap it: "− 4" takes 4 off both sides, so it is the one you want when the left side reads "+ 4".
- A negative constant needs adding, not subtracting. For x − 5 = 2, the move is + 5.
- If the equation is 5x = 2x + 9, subtract 2x — not 2. The x has to travel with its coefficient.
- Par is the shortest possible route, so if you are two moves over, there was a shorter order. Undo and look for the x terms first.
- The answer can be negative, and that is not a mistake — level eight is built from them.
FAQ
Is Algebra Solve X free to play?
Yes. It runs in your browser with no download, no sign-up and nothing to buy. All twelve levels are included and unlock as you clear them.
Do I type the answer?
No, and that is the point. You choose operations and they are applied to both sides, so the thing being practised is the method rather than the arithmetic result. The answer appears when the equation reduces to x on its own.
What kinds of equations does it cover?
One-step equations, two-step equations of the form ax + b = c, equations with x on both sides, and equations with negative constants and negative answers. Everything stays linear and every answer is a whole number.
Can an operation ever change the answer?
No. Every operation offered is applied to both sides, which leaves the solution untouched — that is what makes the method valid. The test suite checks it for every equation the game can generate and every operation it can offer.
Do fractions ever appear?
No. Division is only offered when the divisor goes exactly into every term on both sides, so the working stays in whole numbers throughout.
Is there a time limit?
No, deliberately. Every other maths game here is timed; this one is about choosing the right step, and a countdown turns that into tapping buttons at random. It is scored on moves against par instead.
Where does par come from?
A breadth-first search over the available operations, run when the equation is generated. It is the genuine minimum, not an estimate, so "at par" means no shorter route existed.
How is this different from Balance Scale Puzzle?
Balance Scale Puzzle is about relative weight with no numbers at all — you work out which pile matches another from a set of readings. This is symbolic algebra: an equation with numbers and an x, solved by operating on both sides.