Question: The augmented matrix of a system of linear equations has been carried to the following by row operations. In each case solve the system. (a)

The augmented matrix of a system of linear equations has been carried to the following by row operations. In each case solve the system.
(a)
The augmented matrix of a system of linear equations has

(b)

The augmented matrix of a system of linear equations has

(c)

The augmented matrix of a system of linear equations has

(d)

The augmented matrix of a system of linear equations has

120 3101-I 001-110 2 000 0013 1-2020 111 0 01 5 0 -3-1 0 00016 1213 1|1 01-10 00 0 1 0 1 -1 2 4 6 2 0 0001

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