Respuesta :
Answer:
its always true
Step-by-step explanation:
its always true because if both -k and k were the same number then it would go like this. so lets say k = 7 so that means the equation would be
-7 plus 2 plus 7 so lets add the 7 to the -7 that make 0 and if you add 2 two 0 0 the answer is now 2 that will be the same for any other number as well.