Dial a multiplier on each equation card and stack them so a variable cancels, then solve the leftover equation and back-substitute — elimination and substitution done by hand.
Two linear equations sit on cards: dial a multiplier on each card (it visibly rescales), stack them so one variable's coefficients cancel to zero, solve the one-variable equation that survives, then back-substitute to find the other unknown. A substitution mode drops y = mx + b into the second card to be expanded and simplified, and a mixed mode lets the player choose the method. It targets the misconception that only one 'right' multiplier pair exists — any pair that cancels a variable is accepted — and drills the back-substitution step students skip. Best for Grade 8 (8.EE.8b).
A free, no-signup, no-ads math game for Grade 8 — practising systems-of-equations, elimination, substitution, equations, solve-for-x. Play in your browser on the KidsDoMath games hub or explore more Coordinates & Algebra games.
By grade level: 8th Grade Math Games
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What math does Elimination Engine practice? Elimination Engine practices Systems of Equations, Elimination, Substitution, Equations. Two linear equations sit on cards: dial a multiplier on each card (it visibly rescales), stack them so one variable's coefficients cancel to zero, solve the one-variable equation that survives, then back-substitute to find the other unknown.
What grade is Elimination Engine for? Elimination Engine is built for Grade 8 (ages 13–14). It sits in the Coordinates & Algebra strand, and it ramps across 8 levels so younger or older players find their own pace.
How do you play Elimination Engine? Dial a multiplier on each equation card and stack them so a variable cancels, then solve the leftover equation and back-substitute — elimination and substitution done by hand.
Is Elimination Engine free to play? Yes. Elimination Engine is free, with no ads and no sign-up, and it runs in the browser on a phone, tablet or computer.