Respuesta :

vicentemariza518

Answer:

2x+y

Step-by-step explanation:

x-(-x)+y

x+x +y

2x+y

where is the negative sign, there's an invisible 1 and just multiply it. negative by negative equals positive.

ttrovrlive

Answer:

(C) None of the Above

Step-by-step explanation:

give the expressions so people can give valid explanations and answers.