Equations and Inequalities

Lesson 2

Math

Unit 6

6th Grade

Lesson 2 of 14

Objective


Define and identify solutions to equations.

Common Core Standards


Core Standards

  • 6.EE.B.5 — Understand solving an equation or inequality as a process of answering a question: which values from a specified set, if any, make the equation or inequality true? Use substitution to determine whether a given number in a specified set makes an equation or inequality true.

Foundational Standards

  • 6.EE.A.1
  • 6.EE.A.2

Criteria for Success


  1. Define a solution to an equation as the value of the variable that, when substituted in, makes the equation a true statement.
  2. Use substitution to determine if a given value for a variable is a solution to an equation. 
  3. Make use of structure in expressions and equations to reason about the value of the variable (MP.7).
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Anchor Problems

25-30 minutes


Problem 1

Determine if the equations are true or false when the number given is used for the value of the variable. 

a.   $${12x=84}$$; for when $${x=7}$$

b.   $${y-10=50}$$; for when $${y=40}$$

c.   $${{1\over2}m=16}$$; for when $${ m=32}$$

d.   $${3(x-1)=27}$$; for when $${x=9}$$

Guiding Questions

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Student Response

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Problem 2

Which value of $$x$$ from the set below is the solution to the equation $$4x-14=38$$?

{6, 10, 12, 13, 15}

Guiding Questions

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Student Response

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Problem 3

Below are some equations that each contain a variable. A list of values is also shown. Think about what each equation means to find its solution in the list of values.

List of Values:

$$\frac{1}{4}$$        $$\frac{3}{7}$$        $$\frac{1}{2}$$        $$\frac{4}{7}$$        $$\frac{3}{4}$$        $$0.8$$        $$1$$        $$2$$        $$4$$        $$8$$        $$600$$        $$1,400$$

Equations:

a.  $$1,000-a=400$$

b.  $$x^2=16$$

c.  $$8c=8$$

d.  $$2+x=2.8$$

e.  $$2e=1$$

f.  $$h+\frac{3}{7}=1$$

g.  $$1-x=\frac{1}{4}$$

Guiding Questions

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Student Response

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References

Open Up Resources Grade 6 Unit 6 Lesson 22.3 “Using Structure to Find Solutions”

Grade 6 Unit 6 Lesson 2 is made available by Open Up Resources under the CC BY 4.0 license. Copyright © 2017 Open Up Resources. Download for free at openupresources.org. Accessed Feb. 27, 2018, 11:42 a.m..

Modified by Fishtank Learning, Inc.

Problem Set

15-20 minutes


Give your students more opportunities to practice the skills in this lesson with a downloadable problem set aligned to the daily objective.

Target Task

5-10 minutes


Which equations below have a solution $${x=4}$$?

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Student Response

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Additional Practice


The following resources include problems and activities aligned to the objective of the lesson that can be used for additional practice or to create your own problem set.

Next

Write equations for real-world situations.

Lesson 3
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Lesson Map

A7CB09C2-D12F-4F55-80DB-37298FF0A765

Topic A: Reasoning About and Solving Equations

Topic B: Reasoning About and Solving Inequalities

Topic C: Representing and Analyzing Quantitative Relationships

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