Answer :
a) length=w+5
b )P=2(L+W), and since L=5+w, plug it in
P=2(W+5+W)
P=2(2W+5)
P=4W+10
c) 26=4w+10
16=4w
w=4
b )P=2(L+W), and since L=5+w, plug it in
P=2(W+5+W)
P=2(2W+5)
P=4W+10
c) 26=4w+10
16=4w
w=4