Question 768176
Noelle correctly adds the lengths of three sides of a rectangle and gets 88 cm.
 Ryan correctly adds the lengths of three sides of the same rectangle and gets 80 cm.
 What is the perimeter of the rectangle in cm?
:
We can write this as two equations:
:
2L + W = 88
L + 2W = 80
:
multiply the 1st equation by 2, subtract the 2nd equation
4L + 2W = 176
 L + 2W = 80
-------------------Subtracting eliminates W, find L
3L = 96
L = 96/3
L = 32 is the length
:
Find the width
32 + 2W = 80
2W = 48
W = 24 is the width
:
I'll let you find the perimeter