It depends on how it's used.
For example if it's angles it could be because of Vertical Angles.
If it's Triangles it could be Definition of Congruent Triangles.
250 miles
In order to receive this answer you multiply 50 by 5,and you get 250.
I hope this helps:)
If you have any questions about my answer please feel free to ask:)
15-1/6n=1/6n-1
15+1=1/6n+1/6n
16=1+1/6n
16=2/6n
16=1/3n
16*3/1=n
therefore, n=48.........
I think your answer would be -7.9 hope that helps!