The correct answer to this open question is the following.
We have no question here. It is just a statement. What is your question?
If this is a true or false question, then the answer is "false."
It is false that the Northwest Ordinance Act organized the remaining land from the Louisiana Purchase into two territories with the right to decide (vote) for themselves if they wanted to allow slavery in the territory.
First, let's say that the Louisiana Purchase was agreed until 1803, under the administration of President Thomas Jefferson.
The Northwest Ordinance was a series of legislation enacted by the US Congress in order to regulate the territories of the Northwest. These laws were enacted in 1784, 1785, and 1786.
The Northwest was those territories north of the Ohio River, west of Pennsylvania, South of teh Great Lakes, and on the east of the Mississippi.