Algebra 2
Algebra 2
1st Edition
ISBN: 9780078884825
Author: McGraw-Hill/Glencoe
Publisher: Glencoe/McGraw-Hill School Pub Co
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Chapter 3, Problem 12PT
To determine

To calculate: The solution set for the system of equations.

  2x−y−2z=510x+8z=−43x−y=1

Expert Solution & Answer
Check Mark

Answer to Problem 12PT

The solution set for the system of equations is (2,5,−3) .

Explanation of Solution

Given information:

The system of equations

  2x−y−2z=510x+8z=−43x−y=1

Calculation:

Consider the system of equations

  2x−y−2z=510x+8z=−43x−y=1

Take the first and the third equation,

  2x−y−2z=53x−y=1

Use the method of elimination to solve the system above.

Subtract both the equations,

  2x−y−2z=53x−y+0z=1−−x−2z=4

Simplify it further as,

  −x−2z=4x+2z=−4x=−4−2z

Now substitute x=−4−2z in 10x+8z=−4 .

  10(−4−2z)+8z=−4−12z=−4+40−12z=36z=−3

Substitute z=−3 in x=−4−2z ,

  x=−4−2(−3)x=−4+6x=2

Now substitute x=2 in the equation 3x−y=1 ,

  3(2)−y=1y=5

Therefore, solution is the coordinate pair, (2,5,−3) .

Thus, the solution set for the system of equations is (2,5,−3) .

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Chapter 3, Problem 11PT
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Chapter 3, Problem 13PT

Chapter 3 Solutions

Algebra 2

Ch. 3.1 - Prob. 1ACYPCh. 3.1 - Prob. 1BCYPCh. 3.1 - Prob. 2ACYPCh. 3.1 - Prob. 2BCYPCh. 3.1 - Prob. 3CYPCh. 3.1 - Prob. 4ACYPCh. 3.1 - Prob. 4BCYPCh. 3.1 - Prob. 4CCYPCh. 3.1 - Prob. 4DCYPCh. 3.1 - Prob. 1CYU
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Prob. 30HPCh. 3.5 - Prob. 31HPCh. 3.5 - Prob. 32HPCh. 3.5 - Prob. 33HPCh. 3.5 - Prob. 34STPCh. 3.5 - Prob. 35STPCh. 3.5 - Prob. 36STPCh. 3.5 - Prob. 37STPCh. 3.5 - Prob. 38STPCh. 3.5 - Prob. 39SCh. 3.5 - Prob. 40SCh. 3.5 - Prob. 41SCh. 3.5 - Prob. 42SCh. 3 - Prob. 1QCCh. 3 - Prob. 2QCCh. 3 - Prob. 3QCCh. 3 - Prob. 4QCCh. 3 - Prob. 5QCCh. 3 - Prob. 6QCCh. 3 - Prob. 7QCCh. 3 - Prob. 8QCCh. 3 - Prob. 9QCCh. 3 - Prob. 10QCCh. 3 - Prob. 11QCCh. 3 - Prob. 12QCCh. 3 - Prob. 13QCCh. 3 - Prob. 14QCCh. 3 - Prob. 1MCQCh. 3 - Prob. 2MCQCh. 3 - Prob. 3MCQCh. 3 - Prob. 4MCQCh. 3 - Prob. 5MCQCh. 3 - Prob. 6MCQCh. 3 - Prob. 7MCQCh. 3 - Prob. 8MCQCh. 3 - Prob. 9MCQCh. 3 - Prob. 10MCQCh. 3 - Prob. 11MCQCh. 3 - Prob. 12MCQCh. 3 - Prob. 13MCQCh. 3 - Prob. 14MCQCh. 3 - Prob. 15MCQCh. 3 - Prob. 16MCQCh. 3 - Prob. 17MCQCh. 3 - Prob. 18MCQCh. 3 - Prob. 19MCQCh. 3 - Prob. 20MCQCh. 3 - Prob. 21MCQCh. 3 - Prob. 22MCQCh. 3 - Prob. 1SGRCh. 3 - Prob. 2SGRCh. 3 - Prob. 3SGRCh. 3 - Prob. 4SGRCh. 3 - Prob. 5SGRCh. 3 - 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