00:01
All right, here we want to solve this problem for x and for y.
00:04
Now, let's use elimination on this.
00:07
So let me keep that top the same.
00:15
And let me multiply the bottom by two.
00:19
So we have 10 over x minus 7, minus 2 over y minus 4 is equal to 6.
00:27
And so we've got to where the y parts there match up.
00:31
And so we can just add these two equations together.
00:37
And so we have 13 over x minus 7 on the left.
00:43
And then on the right, 7 plus 6 gives us 13.
00:48
So 13 over x minus 7 is equal to 13.
00:53
Now for cross multiply, this tells us 13x minus 91 is equal to 13 and 91.
01:10
So 13x is equal to 104, divided by 13.
01:19
And so we have x is 8...