Question 573683
P=2L+2W
L=W+5
42=2(W+5)+2W
42=2W+10+2W
42=4W+10
4W=42-10
4W=32
W=32/4
W=8 ANS. FOR THE WIDTH.
PROOF:
42=2(8+5)+2*8
42=2*13+16
42=26+16
42=42