Respuesta :

Answer:

2x +5y -20

Step-by-step explanation:

-x - 3y - 20 + 3x + 8y

Combine like terms

-x+ 3x  - 3y+ 8y - 20

2x +5y -20

Answer:

2x + 5y - 20

Step-by-step explanation:

-x + 3x = 2x

-3y + 8y = 5y