To use: the matrices to solve the system of equations using Gaussian elimination with back substitution.
Answer to Problem 85RE
The solution of the given system of equations is
Explanation of Solution
Given information :
Writing the above system of equation in the matrix form,
Writing the matrix in the augmented form,
Applying Gaussian elimination,
Now, from the last matrix,
Using back substitution,
Now,
Putting z = 1 in equation 2,
Putting
The solution of the given system of equations is
Chapter 7 Solutions
Precalculus with Limits: A Graphing Approach
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