Answer: x=-1
Explanation:
There are two ways I think of.
1st: Substitution
Given the equations, we see that both equations equal y, which means that you could set up this:
-x-6=x-4
We could solve this algebraically, and get:
-2=2x
-1=x
This means that -1 would be the answer.
2nd: Graphing
Graph the two equations, and get an intersection of (-1,-5). Ignore -5 because that is the y=coordinate. You will see that x=-1.