Skip to main content

Section 16.3 Deliberate Practice: Solving by Elimination

Algebra is a skill, which means it requires practice to become proficient. But it will take more than rote repetition to get there. Deliberate practice is the thoughtful repetition of a task. For each of these sections, you will be given a list of specific skills or ideas to focus on as you practice thinking through the problems.

Focus on these skills:

  • Write the original system of equations.

  • Indicate the manipulations of the equations in the process of eliminating the variables.

  • Present your work legibly.

Worksheet Worksheet

Instructions: Solve the system of equations by elimination. If the system has either zero or infinitely many solutions, explain how you can determine this information from your calculations.

4.

{−2x+3y=−8−x+2y=−5