Back to Prove system equivalence — Problem 3 · Task Set 40
Exercises: Prove That the Elimination Method Preserves Solution Sets
Work through each section in order. For proof problems, write complete logical arguments — state what you assume, what you conclude, and which properties justify each step.
Grade 9·19 problems·~40 min·Common Core Math - HS Algebra·standard·hsa-rei-c-5
Work through problems with immediate feedback
A
Recall / Warm-Up
1.
In solving the single-variable equation , we subtract 4 from both sides to get . This is justified by: