Answer:
x=6
Step-by-step explanation:
first you subtract 9 from 27, getting 18.
then you divide 18 by 3, which gives you 6.
therefore, X=6
Link attached (my answer is on paper):
P.S.: sorry for my bad hand writing. If you need clearance I can clear things up.
The area of square: s · s = s²
The area of rectangle: (s + 6) · s = s(s + 6)
So:
s² + s(s + 6) = 56
s² + s(s + 6) - 56 = 0
Answer D.