8n+12-5n=21.N=

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Solution for 8n+12-5n=21.N= equation: 



8n+12-5n=21.=

We move all terms to the left:

8n+12-5n-(21.)=0

We add all the numbers together, and all the variables

8n-5n+12-21=0

We add all the numbers together, and all the variables

3n-9=0

We move all terms containing n to the left, all other terms to the right

3n=9

n=9/3

n=3

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