Linear Algebra Example Problems - General Solution of Augmented Matrix 

Sorry for the small typos in part (c) of this problem. The row reduced matrix should be: 1 0 5 0 7 1 0 1 7 0 -4 -9 0 0 0 1 1 3 This typo doesn't change the conclusion in terms of basic variables and free variables but it is an error and could be confusing if you noticed it. Thanks for watching, Adam

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Thanks for the help! Only complaint is in example "c", in Arr form, should entry (1,5) not be 7? (8-1 != 9)

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how do you reduced rows to echelon form please?