Answer: a=0
Explanation:
8a+a−3=6a−2a−3 
Step 1: Simplify both sides of the equation. 
8a+a−3=6a−2a−3 
8a+a+−3=6a+−2a+−3 
(8a+a)+(−3)=(6a+−2a)+(−3)(Combine Like Terms) 
9a+−3=4a+−3 
9a−3=4a−3 
Step 2: Subtract 4a from both sides. 
9a−3−4a=4a−3−4a 
5a−3=−3 
Step 3: Add 3 to both sides. 
5a−3+3=−3+3 
5a=0 
Step 4: Divide both sides by 5. 
5a /5= 0/5
Answer: a=0
(hope that was helpful )