Answer:
-15a+d
Step-by-step explanation:
5a-20a+12d-11d
-15a+d
Answer:
15 + x
Step-by-step explanation:
Explanation:
If you plug 4 in for x into the equation, the equation becomes this:

When you simplify the equation;

Simplify it further,

That is correct. 6 = 6
Hope that answered the question.
I confused ! I don't get what your trying to say please explain better !
8n - 7
because from 8n, 7 is subtracted