XShift

XShift is an algebra arcade. Catch a term, move it across the equals sign, and solve for x.

Each puzzle is a linear equation. Transpose a term, divide by a coefficient, or merge constants until the equation reads x = a number. The arithmetic stays exact: no rounding and no calculator shortcut.

Arcade
Solve a run of equations before the timer runs out. Each success speeds up the next puzzle. The equation can also shift while you play. A constant may split or change places, but the solution stays the same.

Tutorial and practice
The tutorial follows one equation from 3x + 1 = 10 to x = 3. Practice lets you slow down, turn the timer off, and use hints or undo. Chaos, a faster arcade, unlocks after 20 arcade puzzles solved without a hint.

Play offline in English or Spanish. Settings include reduced motion and high contrast. No account is required.