00:01
I'm going to call the x large and y small.
00:07
So if we set up a system, we have three large, so that's three x and five small for a total of 135 kilograms.
00:24
So those are going to be my units.
00:26
But then we also have nine large and seven small for a total of 27.
00:37
Now, what i would do is multiply my top equation by negative 3.
00:43
Now, we get negative 9x and then minus 15y.
00:47
And 3, negative 3 times 135, is negative 405.
00:53
So the thought process is if i add down because they're both equal, they remain equal.
01:00
So negative 1045 plus 279 is negative 126...