What is Stephen Douglas's answer to the issue of slavery in these territories?

Answer/Explanation

Slavery through unfriendly legislation and the use of police power, in spite of the Supreme Court decision. Douglas believed that only a state, through the voice of its inhabitants and their elected legislatures, had the right to decide to allow slavery within its borders. Douglas argued that slavery was a dying institution that had reached its natural limits and could not thrive where climate and soil were inhospitable.

for this case we have the following equation:

we apply distributive property to the terms within parentheses.

subtracting 2 on both sides of the equation: