00:01
To solve this equation for l.
00:02
And so let's go ahead.
00:03
What i want to do is just isolate this l.
00:06
And so to do that, i need to get rid of some of the things here.
00:09
So i'm going to start by getting rid of the c.
00:11
I'm going to subtract c from both sides.
00:14
There are all kinds of ways you can do this, but i like doing it this way.
00:17
We're going to say v minus c equals.
00:19
Now i'm going to end up putting this n in front, negative n, c minus s over l.
00:27
Now remember, we're isolating l.
00:29
So now, now what i'm going to do is i'm going to divide by negative n.
00:34
So that means we have v minus c over negative n equals c minus s over l.
00:43
So now let's go get rid of the fraction now.
00:46
Let's go multiply both sides by l.
00:49
And so what's going to happen here is my l is going to shift from being to the left side to the right side.
00:57
And it's going to be multiplied by, oops, wrong pin, this entire.
01:01
Expression.
01:03
So that means i'm going to have v minus c over negative n times l equals c minus s.
01:11
To solve this, we can just go ahead and multiply both sides by the reciprocal of this fraction...