00:01
So for this problem, we want to find the length and width of a rectangle.
00:06
And they give us that the length of the rectangle is three times its width, and that the perimeter is 64.
00:14
So let's write an equation to find out what each one is going to be based on the information they give us.
00:22
So i don't know what the width is, but i know that the length is three times the width.
00:26
So if i make the width x, three times the width would be three.
00:33
And now i know to find the perimeter of a rectangle, i'm going to add all the sides.
00:37
Now i know that if this is x, then this side also has to be x.
00:41
And if this is 3x, then this has to be 3x as well.
00:45
So if i add up all the sides, it would be x plus x plus 3x plus 3x equals my perimeter of 64.
00:55
And now i'm going to combine all my like terms.
00:58
These are all like terms...