8n = 9n - 5
First subtract 9n from both sides:
==> 8n - 9n = 9n-5 - 9n
==> -n = -5
Now multiply by -1 both sides:
=> n = 5
since you are measuring the angle,
you can take n=5 degree..
To solve for 8n=9n-5.
Add 5 to both sides.
8n+5 = 9n
Sobtract 8n from both sides:
5 = 9n-8n = n
So n = 5.
8*n = 8*5 = 40.
RHS = 9n-5 = 9*5-5 = 45-5 = 40.
For the beginning, we'll isolate n to the left side.
For this reason, we'll subtract 9n both sides:
8n - 9n = 9n - 9n - 5
-n = 0 - 5
-n = -5
We'll multiply by -1 both sides;
n = 5
Furthermore, to give a geometric meaning for n = 5, we'll consider a polygon that has the numbr of sides, n = 5. This kind of polygon is a pentagon.
The center angle of this pentagon is 360 degrees divided by 5.
the measure of center angle is: 360/5 = 72 degrees.