6+8n+7n=21

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Solution for 6+8n+7n=21 equation: 



6+8n+7n=21

We move all terms to the left:

6+8n+7n-(21)=0

We add all the numbers together, and all the variables

15n-15=0

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

15n=15

n=15/15

n=1

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