[ Mathematics ] Open Question : 10 POINTS, quick easy matrix question?

1 -1 -1 4 0 1 -2 0 0 0 (k-3) 2 consider the matrix above where the 1st 3 columns correspond to the variables x1, x2, x3, respectively. -consistent with a unique solution; - consistent with infinitely many solutions. i know the answer to the first one how do i do the rest?

Source: http://answers.yahoo.com/question/index?qid=20110512035903AAZh6OU

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