Textbook Question
In Exercises 1–8, write the augmented matrix for each system of linear equations.
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Write the system of equations represented by the augmented matrix shown.
x+2y+3z=5;5y+4z=1;4x+7y=12
x+2y+3x=5;5x+4y=1;4x+7y=12
x+2y+3x=5;5y+4z=1;4y+7z=12
x+2y+3x=−5;5y+4z=−1;4x+7y=−12