Lesson 16: Solving Systems by Elimination (Part 3)

Question

Lin and Priya were working on solving this system of equations.

Lin's first move is to multiply the first equation by 3. 

Priya's first move is to multiply the second equation by 2.

1. Explain why either move creates a new equation with the same solutions as the original equation.
2. Whose first move would you choose to do to solve the system? Explain your reasoning.

Answer 1

1. Multiplicative property of equality.
2. That's for you to answer