Answer:
I believe it's A.
Explanation:
The formula for the perimeter of a rectangle: 2(l + w)
Since we have not found x, you would assume it hasn't been doubled yet by the 2. Since the width = 14, it is doubled to 28.
Next, we know from looking at the formula that l and w are added together, so inside the brackets is an addition problem. ( + 28)
Since we know that l = x and l has to be doubled, it will be = (2x +)
If we combine those two equations together it is =
2x + 28 = 48