Question 59719
L=2W+2
2L+2W=52
2(2W+2)+2W=52
4W+4+2W=52
6W=52-4
6W=48
W=48/6
W=8 THE WIDTH IS 8 CM. THEN 
L=2*8+2
L=16+2
L=18 THE LENGTH IS 18 CM.
PROOF
2*18+2*8=52
36+16=52
52=52