Your final answer should be 157/210.
The answer is 27. The square root of 81 is 9 and 9 x 3 is equal to 27.
The square root of 36 is 6 so just write
2 × (6) +9
so
12 + 9
= 21
2+y+3=13
y=13-5=8
2+x+3=8
x=8-5=3
Perimeter=2(13+8)=42
or Perimeter=13+8+2+2+y+x+3+3=31+x+y=31+3+8=42
