00:01
For number 16, i'm to solve the system of equation using elimination.
00:06
Well, nothing lines up already, so i'm going to have to multiply these equations.
00:12
I could get these xs to be 24.
00:15
I'm going to multiply this by 2 and this by 3.
00:17
Or i could get these ys to be 10.
00:21
I think that's what i'm going to do.
00:22
So i'm going to multiply this whole equation by 5.
00:31
And then this whole equation i'm going to multiply by 9.
00:34
Negative 2, because that will make this then a positive 10y.
00:41
So i'm just going to move over here and do that.
00:45
So i have to multiply every piece of that equation by 5.
00:49
So 5 times 12x will be 60x.
00:56
5 times negative 2y would be negative 10y.
01:04
And then 5 times 3 will be 15...