00:01
It's really nice that they give you the equations.
00:03
I probably wouldn't give my students the equations just because i think they can infer six apples plus six oranges equals 750.
00:13
And you can drop that five.
00:16
And then it says 10 apples mixed in with five oranges is equal to 875.
00:24
Now, i'm a big fan of using elimination.
00:28
So what i would probably do is take this top equation and multiply by 5 and then take this bottom equation and multiply by negative 3.
00:40
And my goal is to match up my coefficients.
00:47
Well, i'll just write to eliminate a variable.
00:51
And you do that by matching up coefficients.
00:54
So the top expression, let's do this in red, is 30x.
00:58
Plus 30 y is equal to 7 .5 times 5 is 37 .5 and then i'll multiply the bottom equation...