00:01
Anne barry and kathy in her coffee shop and orders two coffees, one juice and two donuts, and it comes out to $7 .50.
00:12
Barry orders one coffee, three donuts, and that's $375.
00:28
And kathy orders three coffees, one juice, and four donuts, and pays $10 .50.
00:45
Well, let's solve this by elimination.
00:48
I could take the first and third equations and just subtract them.
00:53
So let me write them separately.
01:03
Because we have the same j, we could just subtract.
01:09
2c minus 3c is negative c.
01:11
The jays would eliminate.
01:13
2d minus 4d is negative 2d.
01:16
And 750 minus 1050 is negative 3...