Solution:
The solution steps are given below as
[tex]\begin{gathered} 4(x-6)+12=20 \\ step1:4x-24+12=20(distributive\text{ property\rparen} \\ step2:4x-12=20(by\text{ additon property\rparen} \\ Step3:4x=32 \\ Step4:x=8(division\text{ property\rparen} \end{gathered}[/tex]Hence,
The final answer is ADDITION PROPERTY OF EQUALITY
Hence,
OPTION C is the right answer