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A student solves the following problem: Problem: 2(x − 3) + 3x = 19 Step 1: 2a-6 + 3x = 19 Step 2: 6x6 = 19 Step 3: 6a-6 + 6 = 19 + 6 Step 4: 6x 6x Step5: 뜸 = 25 || = Step 6: 4.17 Where is the mistake? What did the student do incorrectly? Step 3: Student should have subtracted 6 from both sides, not added 6. Step 2: Student should have added 2x + 3x = 5x, not 2 x 3 = 6x Step 1: Student should have only distributed the 2 to the x and not the x & 3. O Step 5: Student should have subtracted 6 from both sides, not divided by 6

A student solves the following problem: Problem: 2(x − 3) + 3x = 19 Step 1: 2a-6 + 3x = 19 Step 2: 6x6 = 19 Step 3: 6a-6 + 6 = 19 + 6 Step 4: 6x 6x Step5: 뜸 = 25 || = Step 6: 4.17 Where is the mistake? What did the student do incorrectly? Step 3: Student should have subtracted 6 from both sides, not added 6. Step 2: Student should have added 2x + 3x = 5x, not 2 x 3 = 6x Step 1: Student should have only distributed the 2 to the x and not the x & 3. O Step 5: Student should have subtracted 6 from both sides, not divided by 6

Algebra and Trigonometry (6th Edition)
Algebra and Trigonometry (6th Edition)
6th Edition
ISBN:9780134463216
Author:Robert F. Blitzer
Publisher:Robert F. Blitzer
ChapterP: Prerequisites: Fundamental Concepts Of Algebra
Section: Chapter Questions
Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...
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A student solves the following problem: Problem: 2(x − 3) + 3x = 19 Step 1: 2x − 6 + 3x = 19 Step 2: 6x - 6 = 19 Step 3: 6x − 6 + 6 = 19 + 6 Step 4: 6x = 25 Step 5: 6 = 25 Step 6: 4.17 Where is the mistake? What did the student do incorrectly? O Step 3: Student should have subtracted 6 from both sides, not added 6. O Step 2: Student should have added 2x + 3x = 5x, not 2 x 3 = 6x Step 1: Student should have only distributed the 2 to the x and not the x & 3. Step 5: Student should have subtracted 6 from both sides, not divided by 6
Transcribed Image Text:A student solves the following problem: Problem: 2(x − 3) + 3x = 19 Step 1: 2x − 6 + 3x = 19 Step 2: 6x - 6 = 19 Step 3: 6x − 6 + 6 = 19 + 6 Step 4: 6x = 25 Step 5: 6 = 25 Step 6: 4.17 Where is the mistake? What did the student do incorrectly? O Step 3: Student should have subtracted 6 from both sides, not added 6. O Step 2: Student should have added 2x + 3x = 5x, not 2 x 3 = 6x Step 1: Student should have only distributed the 2 to the x and not the x & 3. Step 5: Student should have subtracted 6 from both sides, not divided by 6
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