Step-by-step Answer
PAGE: 393SET: ExercisesPROBLEM: 27
Please look in your text book for this problem Statement

The system of equations are  

Write the equations into matrix form .

Where is coefficient matrix, is variable matrix and is constant matrix.

Definition of inverse matrix :

If is an then , where

Let , then .

, then has an inverse.

Cofactor of  is

Cofactor of


Find .


The inverse of the is  

Multiply by to solve the system.



, and .


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