8n+3-2n=21

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Solution for 8n+3-2n=21 equation: 



8n+3-2n=21

We move all terms to the left:

8n+3-2n-(21)=0

We add all the numbers together, and all the variables

6n-18=0

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

6n=18

n=18/6

n=3

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