Respuesta :

Answer:

9. 20y + 2y to get 22y +4

10.-2y - 6y = 4y to get 5x + 12z +4y

11. 5x +1y + 6

Step-by-step explanation:

If a - is next to a number then it becomes negative and if it has a letter like y add or subtract it’s to the other y