Question 100464
W=(L/2)-3
P=2(L+W)=36
2(L+((L/2)-3)=36 Replace W with (L/2)-3.
2L+2((L/2)-3)=36 
2L+L-6=36 
3L-6=36
3L=42 add 6 to each side.
L=14 divide 3 into each side.
W=14/2-3=4
Check:
4 is 3 inches less than 1/2 of 14
2(14+4)=36
Ed