Are you teaching your middle school math or Algebra I students how to Solve Systems of Equations by Elimination? Look no further than this investigation, note, and practice resource that specifically focuses on solving systems of equations by elimination only using Multiplication by 1 constant. These notes and practice problems only involve multiplying one equation by a constant. Therefore, this resource would be very beneficial for an 8th-grade mathematics class, an Algebra IA class, or a revi