Students will solve linear systems of equations then color the question number on their christmas trees with their answer. This is an excellent quick check review activity or homework assignment. If they get the wrong answer, they will color the christmas tree's incorrectly.
Reviews the following topics:
1. Solving Linear Systems of Equations by Substitution
2. Solving Linear Systems of Equation by Elimination
Answer Key is included with correct work for each problem + the correct christmas tree's picture.
Common Core Standards: HSA.REI.C.5: prove that, given a system of two equations in two variables, replacing one equation by the sum of that equation and a multiple of the other produces a system with the same solution. HSA.REI.C.7: Solve a simple system consisting of linear equations… in two variables algebraically and graphically.
If you are looking for a more complex worksheet involving systems of equations (linear and non-linear), please check out my Doodle-ing Math: Solving Systems of Equations