00:03
So in our given question we have been allotted with 3 equations and we need to find out x1, x2 and x3.
00:10
So the equations are as follows.
00:13
2x1 plus x2 minus 4x3 is equal to 5.
00:21
4x1 plus 2x3 is equal to 12.
00:27
And minus 4x1 plus 2x2 minus 12x3 is equal to 14.
00:37
So equation 1, equation 2 and equation 3.
00:43
Now firstly we will be multiplying equation 1 by 2 and then subtract equation 3.
00:51
Multiplying equation 1 by 2 and subtracting from 3.
01:18
We will be getting multiplying equation 1 by 2.
01:23
So multiplying it by 2 we will be getting 4x1 plus 4x2 minus 8x3 minus 4x1 plus 2x2 minus 12x3 is equal to 10 minus plus 14.
01:57
Now solving the equation we will be getting the values of.
02:02
So solving the equation we will be getting 6x1 plus 4x3 is equal to 21.
02:10
Which is equation number 4.
02:15
This is equation 3.
02:17
Now multiplying equation 2 by 2.
02:20
Multiplying equation 2 by 2 and subtracting by 4.
02:36
And subtracting by 4 we will be getting 6x1 plus 4x3 minus 8x1 plus 4x3 which is equal to 21 minus 24...