00:01
Hello, hope you're doing well.
00:02
So we've got our system of equations here that we're going to solve using the addition method.
00:06
So to do that, we need to eliminate one of our variables.
00:09
So we're going to try and eliminate our variable x.
00:12
So to do that, we're going to multiply our first equation by minus 3.
00:17
So distributing this minus 3, we've got minus 3 times x, it's minus 3x, got minus 3 times 3y is minus 9y.
00:26
That's equal to minus 3 times 2, which is equal to minus 3 times 2, which is equal to minus 3.
00:30
Minus 6.
00:32
Then we can rewrite, just bring over our second equation here.
00:37
When we add these two equations here, we've got minus 3x plus 3x just goes to 0.
00:43
This eliminates our x variable.
00:45
But here, minus 9y plus 9y also cancels out and just goes to 0...