Why was it important to maintain a balance of free states an slave states

Answer: It kept each side from having too much power in Congress.

Explanation:

the government wanted to keep the balance because they knew if one side got to much power then some sort of fight would break out. But the system failed and it led to the civil war which lasted 4 years.

It kept each side from having too much power in Congress. It allowed slavery to spread into new territories. It protected the rights of enslaved Africans