Respuesta :

Answer:

3x - 4y

Step-by-step explanation:

sum means addition so:

(2x - 5y) + (x + y) =

2x + x = 3x

-5y + y = -4y

put those two answers together and you get 3x - 4y

Answer:

(A) 3x - 4y

Step-by-step explanation: