00:01
We're going to work with an age mindbender problem right now.
00:06
And what we know is that kevin is three times as old as bob.
00:11
So we're going to use k for kevin and b for bob.
00:23
We know that kevin is three times as old as bob.
00:27
So kevin equals three times bob.
00:33
We know that three years ago, their ages added up to be 22.
00:40
So we need to think about how could we talk about three years ago? three years ago.
00:50
Well, we want to work with kevin and bob's ages now.
00:54
So three years ago, kevin would have been k minus three, and bob would have been bob minus three.
01:03
And we would take those two values and add them up and say k minus three plus b minus three.
01:14
Minus 3, add it up to 22...