Solving Systems of Linear Equations using Matrix Algebra (AX=B)
Published on March 11, 2026
Demonstrates how to convert a simultaneous equation set into the matrix equation AX=B and solve it using techniques like matrix inversion or augmented matrix reduction.
Question
SYSTEM OF EQUATION IN MATRIX TO SOLVE SIMULTANEOUS EQUATION
Answer
-
is the coefficient matrix. -
is the column vector of variables. -
is the column vector of constants.
-
Write in Matrix Form (
): -
Method 1: Using Inverse (
) - Calculate the determinant of
: . - Calculate the inverse
: - Calculate
: - Therefore,
and .
- Calculate the determinant of
-
Method 2: Using Augmented Matrix and Gaussian Elimination
- Set up the augmented matrix:
- Swap
and : - Perform
: - Perform
: - Perform
(Gauss-Jordan): - The solution is
and .
- Set up the augmented matrix: