Instructional Activity# Old and New Ways to Solve

Lesson 9. Unit 6. Grade 7 Open Up Resources

Open Up Resources15 min(s)

This Instructional Activity is a part of the Lesson 9, Unit 6, Grade 7. These are all solvable by thinking "what value would make the equation true." So, it's straightforward to figure out what the solution would be, but these equations present an opportunity to demonstrate that "doing the same thing to each side" still works when there are negative numbers. Monitor for students who reason about what value would make the equation true and those who reason by doing the same thing to each side.