I believe the answer is x = 4
Answer:
135.42
Step-by-step explanation:
Find area of all sides then add them together
Expand:
3x - 12 = 12x
3x - 12x = 12
-9x = 12
x = 12/-9
Simplify:
x = -4/3 - Final answer.
1/2, 2/4, 3/6, 4/8, 5/10, 6/12, 7/14, 8/16, 9/18, 10/20, 11/22, 12/24, 13/26, 14/28, 15/30, 16/32, 17/34, 18/36, 19/38, 20/40