6n-5+7n=21

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Solution for 6n-5+7n=21 equation: 



6n-5+7n=21

We move all terms to the left:

6n-5+7n-(21)=0

We add all the numbers together, and all the variables

13n-26=0

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

13n=26

n=26/13

n=2

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