Question

Lily is trying to solve the problem below. The length of a rectangle is 8 inches greater than the width. The perimeter is 80 inches. What is the width of the rectangle? Lily decided to let w stand for the width of the rectangle. Which problem-solving step was this?
A. Gather your resources
B. Come to an answer
C. Understand the problem
D. Check your answer and present the solution

Answer 1

Let L be the length & W the width. Given L=W+8. The perimeter of a rectangle is: 2 x (L+W), since L=W+8 ===> perimeter = 2 x (W+8+W) =80
4W+16=80===> W=16 & L=16+8=24.
Let's check the answer. Since L=24 & W = 16 so the perimeter is :
2 x (16+24) = 2 x 40 = 80

Answer 2

This problem-solving step is C