Find the Error | Algebra 1 | A-REI.A.1 🖤💙
In this math video we will find the error in student work solving a linear equation. We will clear parentheses by using the distributive property. Since there are variables on both side of the equation, we will use inverse operations and the Subtraction Property of Equality to collect variable terms to one side. We will use the Addition Property of Equality to collect constant terms to the opposite side. We will use the Division Property of Equality to clear the coefficient and solve for x. We will identify the student error in the given solution. An exemplar solution is modeled and explained.
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00:00 Introduction
00:13 The Problem
00:44 Understanding the Problem
00:53 Using the Distributive Property
01:16 Checking the Student's Step 1
01:32 Collecting Variable Terms Using the Subtraction Property of Equality
02:23 Using the Addition Property of Equality
02:42 Combining Like Terms
03:09 Clear the Coefficient Using the Division Property of Equality
03:33 The Student Error - Solution
Reasoning with Equations and Inequalities
Understand Solving Equations As A Process Of Reasoning And Explain The Reasoning
HS.A-REI.A.1 Explain each step in solving a simple equation as following from the equality of numbers asserted at the previous step, starting from the assumption that the original equation has a solution. Construct a viable argument to justify a solution method.
Identify which step in the solution of an equation contains an error.