What is the value of n if 8n=9n-5i am looking for an angle measurement

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hala718's profile pic

hala718 | High School Teacher | (Level 1) Educator Emeritus

Posted on

8n = 9n - 5

First subtract 9n from both sides:

==> 8n - 9n = 9n-5 - 9n

==> -n = -5

Now multiply by -1 both sides:

=> n = 5

gaurav289018's profile pic

gaurav289018 | Student, Grade 11 | (Level 1) Honors

Posted on

8n=9n-5

5=9n-8n

5=n

therefore, n=5

since you are measuring the angle,

you can take n=5 degree..

neela's profile pic

neela | High School Teacher | (Level 3) Valedictorian

Posted on

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.

Tally:

LHS:

8*n = 8*5 = 40.

RHS = 9n-5 = 9*5-5 = 45-5 = 40.

giorgiana1976's profile pic

giorgiana1976 | College Teacher | (Level 3) Valedictorian

Posted on

For the beginning, we'll isolate n to the left side.

For this reason, we'll subtract 9n both sides:

8n=9n-5

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.

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