Respuesta :

Answer:

6

Step-by-step explanation:

First, subtract 9 on both sides:

d+9-9=15-9

d=6

Hope this helped!

Answer:

6 + 9 = 15

Step-by-step explanation:

d + 9 = 15, you take 15 and substract it by 9 so you can get 6

15 - 9 = 6