Respuesta :

psychicide

Answer:

10y

Step-by-step explanation:

9y is equal to y+y+y+y+y+y+y+y+y.

If you add y to that you get (y+y+y+y+y+y+y+y+y)+y, which is equal to 10y.

Answer:

10y

Step-by-step explanation:

9y+y=10y

If you set y to a value such as 2, you'd get:

18+2=20 which means 10y is correct.