Answer:
All real numbers
Explanation:
First, distribute the -4 on the left side
2x-4(x+2)=-2x-8
2x-4*x+-4*2=-2x-8
2x-4x-8= -2x-8
Combine like terms on the left side
-2x -8 = -2x -8
Since the two sides are equal, all real numbers are solutions
Hope this helps! :)