Question 101108
L=2w-5
A=w(2w-5)
(w+5)((2w-5)+2)=81+w(2w-5)
(w+5)(2w-3)=81+2w^2-5w
2w^2+7w-15=2w^2-5w+81
12w=96
w=8
L=16-5=11
I checked this and its ok.
Ed