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QUESTION
Given: x+y+z=7 2x+3y+z=18 -x+y-3z=1 (A). solve by performing elementary row operations on the augmented matrix.
Given:
x+y+z=7
2x+3y+z=18
-x+y-3z=1
(A). solve by performing elementary row operations on the augmented matrix.(B). based on the answer in part (A) what can you say about the invertibility of the coefficient matrix? Justify your answer.
