Elementary Row Operations - Solve Using an Augmented Matrix

In this video we discuss how to solve a linear system of 3 equations 3 variables using an augmented matrix and row operations. We go through 3 examples discussing the order to work in to successfully put the matrix in row reduced echelon form. We also discuss tips and techniques throughout the three examples.

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[daniellespinosa]

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[EvidenciaChengeta-blys]

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[zonkpiece]

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[datboiomar]

In the top right you put a ordered system to follow in order to not undo any operations how would that order changed if you have a system of 4 equations instead of 3

[rojakarki]

Can you please tell me how to sove if we have four equations

[HannahHarper-sl]

how did you get " 5R" on the third step?

[Neddrrahh]

Can I use this strategy on a matrix of a bigger size, and how?

[rojakarki]

My professor taught us with two equations and three but in exam he gave us with four equations to solve my this method

[Neddrrahh]

does it change anything (matter) if i operate say R1-R2 instead of -R1+R2?

[creativitybyayesha]

You explained very well but your second answer is incorrect
The correct answer is (5, -1, -2)

[noahgeiger]

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