Answer:
[tex]7d[/tex]
Step-by-step explanation:
[tex]10d-3d = 7 d[/tex]
hope it's helpful dear :)
The answer to this question is:
7d
In this equation they want you to subtract 10 from 3 and that is 7. Make sure the two letters are the same. If they are you can simplify. If they are different letters you can not simplify further.