Answer:
x=(1/2)n
Explanation:
First we need to put our like terms together. We have two seperate terms that include nx so we can put them together on one side of the equation
9=18nx
Now since we are solving for x we need to get X by itself and we can move the 18n to the other side with the 9 by dividing both sides by 18n and we get
(9/18)n=x and we can simplify that fraction to (1/2)n=x
I hope this helps and please don't hesitate to ask if there is anything still unclear!