Tami,

The task here is to carefully read the two sentences and turn them into equations. First you need labels for the dimensions of the rectangle, the length and the width. I am going to call them L and W.

The first sentence says "The length of a rectangle is twice the width." using my labels this is

L = 2 W

The second sentence says "The number of square units in it's area is four times the number of units in it's perimeter." The area of a rectangle is the length times the width (L W) and the perimeter is the distance all the way around so that's L + W + L + W = 2 L + 2 W. Thus the equation that comes from the second sentence is

L W = 4 (2 L + 2 W)

Substitute L = 2 into the second equation and solve for W.

I hope this helps,
Penny