Answer:
The answer is d=2. (if your solving for d)
Step-by-step explanation:
Alright, so you said you combine like terms. First, combine 9d+1d.
9d+1d-3d=14 ---> 10d-3d=14
Now, do 10d-3d.
10d-3d=14 ---> 7d=14
Now, you have to divide both sides by 7.
7d=14 ---> d=2
You get your answer as d=2.
I hope this helps!