Just add 16 to both sides and you get y = 18
Simple...
you have: 18-7x= -20.5
Isolate the variable x
18-7x= -20.5
18-7x= -20.5
-18 -18
-7x=-38.5
Now simply divide-->>
x=5.5
Thus, your answer.
Answer:
C
Step-by-step explanation:
4(10^2) = 400
Check:
10x10=100 (area of 1 wall)
100× 4(the 4 walls)
4(10^2) = 400✅