 This is your case. This guy has 70 students. I am going to do the question. Yes sir. I will decide who I am. I will decide who I am. Okay. The best thing to solve this. Do this. Multiplies B plus C. C plus A. Do C1 as the C, C plus A. Do C1 as the C, C plus A. Do C1 as the C, C plus A. Do C1 as the C, C plus A. A plus B. Can we use a different approach? Yes sir. It's not an approach. Whatever seems... Yeah. I can see very well how to do how to do the like simple without expansion. The question is without expansion. The end is going to be 0. Common from C to A. Will you say C to A? Yeah. So you think this is B, C. A, C plus B, C. These two columns. That means you do C1 as transform to C1 plus C, C plus A, C. C plus A, B. And A, C plus B, C. Now take it. C plus C, A. Common form. No. No. Now this approach itself is important. Let me tell you. What's to call it? I know. I know. I know. We had a set of guidelines to follow for augmented transformations or something. There's no guideline discussed. Again. So A, A, B, C. Common form C3. Common form C4. Common form C5. Correct. Now C. They're still not the same. If you start swapping the... or interchanging the rows. Now, if I want this until B0, that means I have to show my example that by swapping the positions of columns I need to somehow get to this. So of course the first thing that you would do is swap the position of first column and third column. Change the sign language. Change the sign language? I got it. Does it not... Directly with R1 from R1 to R2 from R2 to R2 minus R3 because it's not... What do you need to expect? You get the same. Right? How can I do this? How can I do this? How can I do this? I swap the positions. I have already applied this with A1, D1, C1. And then DPC. DPC, DPC, DPC, DPC. DPC, DPC, DPC, DPC. This is a fight.