Since it is on the left up corner, its in quadrant 2
You can isolate the variable by subtracting 6 from both sides.
e.g.
x + 6 = 13
- 6 - 6
Now we have x = 7, which not only isolates the variable but solves for x.
If you don't know why we can subtract from both sides, look up the Addition Property of Equality and Subtraction Property of Equality.
Answer:
Is there any more to the problem but BC could be the answer it depends on what your supposed to be looking for
Step-by-step explanation: