00:01
We need to solve the following system.
00:02
So we're going to get rid of our fraction.
00:04
So our first equation, we're going to multiply by the common denominator of six.
00:09
So that gives us 2x.
00:12
6 divided by 2 is 3, so that's minus 9y, is equal to negative 30.
00:18
Our second equation, we're going to multiply everything by 12.
00:21
That's our common denominator.
00:22
12 divided by 4 is 3, so that gives us 9x plus 4y is equal to 33, no, 12 times 11, i don't know what was thinking, 12 times 11 is equal to 132.
00:43
So we need to find a common number that these can be made into.
00:47
So we're going to cancel out our ys by making them both into 36es.
00:51
So we're going to multiply our top equation by 4, our bottom equation by 9.
00:56
So we get 8x minus 36y is equal to negative 120...