Answer:
68-x
Step-by-step explanation:
71-x-3=71-3-x=68-x
Undefined terms is the category its belongs to.
The sum of the interior angles of a triangle is 180 degrees
2x-9+3x+x+3=180
6x-6=180
6x=186
x=31
A=2(31)-9
A=62-9
A=53
1/3 + 1/3 + 1/3 + 1/3 + 1/3 + 1/3 = 6/3
