Students will solve linear systems using the elimination method.
In this partner activity, students are given a different set of problems with the same solutions. Partners solve problems and compare solutions. If they don't match, they must do some error analysis. This leads to great conversations and is an effective way to encourage students to learn from their mistakes, communicate their thought processes to each other, and critique the reasoning of their peers.
*There are 9 problems per partner (18 total). In the equations, all terms are aligned (students to not have to rearrange terms). Some problems require multiplying before eliminating a term. There is one "no solution" problem and one with "infinitely many solutions".