Question

the length of a rectangle is four times its width. If the area is 100 in^2, find its perimeter

Answer 1

Width = x
Length = 4x
Perimeter = 100

Now try making a equation first, then solve it.

Answer 2

L = 4 W
Area = L W = 100
Perimeter = 2 L + 2 W

Start by replacing L with 4W to get everything in W terms.