Denise G. answered • 24d

Algebra, College Algebra, Prealgebra, Precalculus, GED, ASVAB Tutor

Let width = x

length = 5x-12

Perimeter = w+w+l+l or Perimeter = 2w+2l

156=x+x+5x-12+5x-12 Combine like terms

156=12x-24 Add 24 to both sides

156+24=12x-24+24 simplify

180=12x Divide both sides by 12

180/12=12x/12

**x=15 **

Next calculate the length

length = 5x-12 = 5(15)-12

**length = 63**

**Dimensions are 15 cm x 63 cm**