7*n=14+21

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Solution for 7*n=14+21 equation: 



7n=14+21

We move all terms to the left:

7n-(14+21)=0

We add all the numbers together, and all the variables

7n-35=0

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

7n=35

n=35/7

n=5

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