Question 268554
L=3W-1
2L+2W=54
2(3W-1)+2W=54
6W-2+2W=54
8W=54+2
8W=56
W=56/8
W=56/8
W=7 ANS. FOR THE WIDTH.
L=3*7-1
L=21-1=20 ANS. FOR THE LENGTH.
PROOF:
2*20+2*7=54
40+14=54
54=54