For poster:
8w = 24 (8 widths are 24 inches)
w = 3
l = 9
For banner:
12w = 24
w = 2
l = 10
A rectangular poster is 3 times as long as it is wide. A rectangular banner is 5 times as long as it is wide. Both the banner and the poster have perimeters of 24 inches. What are the lengths and widths of the poster and the banner?