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We are given to solve the system of linear equations.
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The first equation is x1 plus 2 x2 minus x3 is equal to 1.
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Second equation is x1 plus x3 is equal to 3.
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And the third equation is x1 plus x2 is equal to 2.
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Firstly, we will write it in the form of augmented matrix as 1, 2, minus 1, 1, 0, 1, 1, 1 and 0, 1, 3.
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Now we will apply row operations.
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Firstly, we will apply r2, r2 minus r3 and on the third row we will apply r3 minus r1.
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Basically, we have to make these two 0...