SOLUTION: Please help /w tough Precalculus question that involves row-echelon form. Which of the following demonstrates the augmented matrix for the system of equations given below? sy

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Question 1078142: Please help /w tough Precalculus question that involves row-echelon form.
Which of the following demonstrates the augmented matrix for the system of equations given below?
system of equations & solutions: https://s17.postimg.org/a4vvic9kf/row-e.png
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
It's not tough at all.
Look at the coefficient matrix.
A=%28matrix%283%2C3%2C%0D%0A1%2C2%2C-1%2C%0D%0A-1%2C1%2C-3%2C%0D%0A4%2C3%2C-2%29%29
Now just "add" the column matrix that contains the right hand side constants as a new column,
b=%28matrix%283%2C1%2C-2%2C3%2C4%29%29
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.
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%28matrix%283%2C3%2C%0D%0A1%2C2%2C-1%2C%0D%0A-1%2C1%2C-3%2C%0D%0A4%2C3%2C-2%29%29+%28matrix%283%2C1%2C-2%2C3%2C4%29%29=