Elementary Linear Algebra 7th Edition

Published by Cengage Learning
ISBN 10: 1-13311-087-8
ISBN 13: 978-1-13311-087-3

Chapter 1 - Systems of Linear Equations - 1.1 Introduction to Systems of Linear Equations - 1.1 Exercises: 58

Answer

Using Wolfram Mathematica we obtain the following solution to this system of equations: $$x=0.8;\quad y=1.2;\quad z=-2.4$$

Work Step by Step

One of the simplest way to solve a system of linear equations by a computer is using Wolfram Mathematica and the following sequence: Solve[{120.2 x + 62.4 y - 36.5 z == 258.64, 56.8 x - 42.8 y + 27.3 z == -71.44, 88.1 x + 72.5 y - 28.5 z == 225.88 }, {x, y, z}]; which gives us for the solution: $$x=0.8;\quad y=1.2;\quad z=-2.4$$
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