Correct answer gets marked brainlist!! :)

Answer:
X=6
Step-by-step explanation:
To find the area of a triangle, you have to divide the multiplication by 2. So first, you would find 6 times what is 18. 3. But since thats the FULL answer, you multiply 3 by 2. 3 times 2 is 6! So x=6!
hope this helped you!