00:01
If the combined spending on housing, vehicles, and healthcare was 13 -860, then h plus v, actually, the way the variables are being used, i'll use them, would be p for housing, t for vehicles, v for healthcare, equals 13 -860.
00:30
The difference between spending on housing and vehicles, so the difference is subtraction, the difference between those was 30803.
00:42
The difference between housing and healthcare was 535.
00:51
We want to solve this system.
00:54
We can solve it in a variety of ways.
00:59
We could, for instance, i don't want to assume that you can do matrices.
01:13
So i will do this in an old school way.
01:18
Let's say that we do elimination with eliminating the p's on the first two by subtracting.
01:38
So if i number these one, two, and three, then we're going to do equation one minus equation two.
01:48
So p minus p is gone.
01:50
T minus negative t is 2t.
01:54
And then we would have v minus 0b, so we're subtracting in that order.
02:02
So that would be v.
02:04
And then 13860 minus 3803...