00:01
Okay, keep in mind that distance equals rate times time.
00:10
So we have the rates, and we actually have the times, and we know that these are the same distance.
00:18
So if we can write expressions that give us that distance, we can set them equal to each other.
00:28
So let's call one of them x.
00:31
It doesn't matter which one.
00:32
Let's say this one is x.
00:34
So this is my rate, this is my time.
00:39
We know that the total trip took five hours.
00:42
So if this one's x, then this one's 5 minus x.
00:49
So let's do rate times time.
00:52
So 68 .9 times x is going to be equal to 56 .1 times 5 minus x.
01:05
So we're just setting those two equal to each other because we're assuming that they are the same distance.
01:12
All right, let's work on the right side first.
01:15
We need to distribute that 56 .1.
01:19
So 56 .1 times 5 is 280 .5 minus 56 .1 x.
01:32
Let's get the x's on the same side...