Answer: The old parking lot was expanded by x feet.
Step-by-step explanation:
Since we have given that
The size of the new parking lot will be twice the size of the old parking lot.
Let the size of old parking lot be 'x'.
So, According to question, the size of new parking lot would be '2x'.
So, It means the old parking lot was expanded by
Size of new parking lot - Size of old parking lot
=2x-x
=x feet
Hence, the old parking lot was expanded by x feet.