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
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