Answer:
The answer is D) [tex]8x+3=12[/tex]
Step-by-step explanation:
In order to determine the correct option, we have to know about the substitution property.
The substitution property is when we replace the variable of the equation by a number. For example:
Given
[tex]x+y=12\\x=3\\\\3+y=12\\y=12-3\\y=9[/tex]
In this example, we applied the substitution property replacing the "x" variable by 3.
For this case:
[tex]8x+y=12\\y=3\\\\8x+3=12[/tex]
So, the final expression is matching with the D) option.
Finally, the correct answer is D) [tex]8x+3=12[/tex]
