PLEASE HURRY!!!! I have added the question in the attachment box. This is time sensitive so please help me

Answer:
Step-by-step explanation:
The answer is 33cm.
width: x length: 6+x
x+x+6=72 ==>
2x+6=72 ==>
2x=72-6 ==>
2x=66 ==>
x=66/2 ==>
x=33.
width=33 33+6=39 >length
33+39=72>perimeter