Solve the system of linear equations, using the Gauss-Jordan elimination method. 
Definitions:
Inaccurately
Incorrectly; without precision or truthfulness.
Informal Assessment Techniques
Methods used to evaluate individuals in a less structured manner, often using observation, interviews, or qualitative analysis.
Highly Valid
Refers to the extent to which evidence and theory support the interpretations of test scores for its intended purposes, indicating a high level of accuracy and reliability.
Increase Understanding
Enhancing one's comprehension or grasp of a subject, object, or situation.
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