Answer:
c
Step-by-step explanation:
X=-1
x=1
x=2
if wrong sorry
Answer:
a = 
Step-by-step explanation:
First, you want to add d on both sides.
ab-d = c
<u>+d +d</u>
ab = c+d
Now, divide b on both sides.
ab = c+d
<u>/b /b</u>
a = 
I hope this helps; have a great day c:
(Also, I just realized that I solved only the question that you typed, not the picture...do you need the answer for the question in the picture???)
opposite of a sum property
hope it helps