3, Lesson 25, Unit 4, Grade 8, EngageNY icon
Instructional Activity


Lesson 25. Unit 4. Grade 8 EngageNY

EngageNY7 min(s)

This Instructional Activity is a part of the Lesson 25, Unit 4, Grade 8. The formal proof shown on the following page is optional. The Discussion can be modified by first asking students the questions in the first two bullet points and then having them make conjectures about why there is just one solution to the system of equations.

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