12-3x ..... 12=3x .... x=4
l = 2w-3
P = 2(l+w)
substitute in for l
P = 2(2w-3 +w)
combine like terms
P = 2(3w-3)
P = 6w-6
P(w) = 6(w-1)
5 2/3 = 17/3 = 34/6
8 5/6 = 53/6
34/6 - 53/6 = -19/6 = -3 1/6
Answer:D
hope this helps
