Answer:
I found:
length = 10cm
width = 7cm
Step-by-step explanation:
Call the length l , the width w and the perimeter P ; you get:
l = 2 w − 4
P = 2 l + 2 w
Where P = 34 c m
so, substitute the first into the second for l :
34 = 2 ( 2 w − 4 ) + 2 w
34 = 4 w − 8 + 2 w
6 w = 42
w = 42 /6 = 7 c m
use this into the first equation:
l = 2 ⋅ 7 − 4 = 14 − 4 = 10 c m
Hope this helps!
