Solve For x:

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Question

diffcult

Correct option is

– 11/97

Subtracting twice the first row from the third row, we have

Now subtracting 3/2 times the first row from the second row, we have

Now adding 4 times the first column to the second column, we have

Expanding along the third row, we have

= – 33x – 3 – 64x – 8 = – 97x – 11

The given equation now becomes – 97x – 11 = 0 or x = – 11/97