Answer:
28
Explanation:
From what I can see in the photo, it says one side is 2x+5 and the other is 5x + 2. All side lengths in a rhombus are equal, so we know that:
2x+5 = 5x+2
3 = 3x
1 = x
So one side length is 7. With all four sides, you get 4 * 7 = 28