Answer:
I am not really sure but try this -13/9 or -13 divided by 9
Step-by-step explanation:
x = 6
The average of 4 numbers is 6, which means that (3 + 5 + 10 + x) all divided by 4 is 6. That means that 3 + 5 + 10 + x = 24, because 24/4 is 6.
18 + x = 24, subtract 18 from 24 to get x = 6.
Answer:
The area of building c minus the area of building b equals the area of building a might be correct?