Answer:
Explanation:
We know the area of the rectangle is length * width
We also know width = length - 5
Thus area is 
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To promise a constitution
18 boxes of nails weighs 49.5 kg
So one box weighs 49.5/18=2.75 kg
Therefore each box weighs 2.75 kg
That means each box weighs 2 wholes and 3 by 4