I believe the answer would be 24 square units
Answer:
answer is 24 :)
Step-by-step explanation:
Divide the 1st equation by 2:
![a + 2c = 19](https://tex.z-dn.net/?f=a%20%2B%202c%20%3D%2019)
Divide the 2nd equation by 3:
![a + c = 13.5](https://tex.z-dn.net/?f=a%20%2B%20c%20%3D%2013.5)
Therefore, when we subtract the exact the 1st equation by the 2nd equation:
![c = 5.5](https://tex.z-dn.net/?f=c%20%3D%205.5)
Substituting back into the 2nd equation will give: