Answer:
A. [tex] (3x + 6) - x - x [/tex].
Step-by-step explanation:
In the diagram given, the door is located in the middle of the length of the diagram.
The length of the diagram = [tex] 3x + 6 [/tex]
The width of the door is part of the [tex] 3x + 6 [/tex].
x and x, are the remaining part of [tex] 3x + 6 [/tex].
To get the width of the door, x, and x, needs to be subtracted from [tex] 3x + 6 [/tex].
Therefore, the width of the door = [tex] (3x + 6) - x - x [/tex].
