Question 329966
L=W+12
P=2L+2W
68=2(W+12)+2W
68=2W+24+2W
68=4W+24
4W=68-24
4W=44
W=44/4
W=11 ANS. FOR THE WIDTH.
L=11+12=23 ANS. FOR THE LENGTH.
PROOF:
68=2*23+2*11
68=46+22
68=68