Assessment Problem:

Here are two equations:

213x + 476 = 984

213x + 476 + 4 = 984 + 4

•Without solving either equation, what can you say about the answers to these equations?

a) Both answers are the same b) Both answers are different c) I can’t tell without doing the math

•Explain your reasoning

Mathematical Issues:

How does a transformation to both sides of the equation impact the solution?

Domain:

Algebraic Relations

Theme:

Solutions

Common Core Standards:

7.EE.2

Technology:

Math Flyer would allow for the graphical representation of both systems. It would demonstrate that the solution does not change.

Research References:

Rittle-Johnson, B., & Star, J. R. (2007).