Unit 4 - Lesson 4 - Grade 8: Illustrative Mathematics

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Last updated 2 months ago

9 Questions

Note from the author:

Grade 8 Unit 4
Lesson 4: More Balanced Moves
CC BY 2021 Illustrative Mathematics®

Instructions

Grade 8 Unit 4
Lesson 4: More Balanced Moves
CC BY 2021 Illustrative Mathematics®

Lesson: More Balanced Moves

Different Equations? (Warm Up)

Equation 1

x - 3 = 2 - 4x

Which of these have the same solution as Equation 1? Be prepared to explain your reasoning.

Equation A:
2x - 6 = 4 - 8x

Equation B:
x - 5 = -4x

Equation C:
2(1 - 2x) = x - 3

Equation D:
-3 = 2 - 5x

Step by Step by Step by Step

Here is an equation, and then all the steps Clare wrote to solve it: 

Here is the same equation, and the steps Lin wrote to solve it:

Mai and Noah also solved the equation, but some of their steps have errors. Find the incorrect step in each solution and explain why it is incorrect.

Make Your Own Steps

Solve these equations for x.

Cool Down: Mis-Steps

Mis-Steps