4+7n=21

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Solution for 4+7n=21 equation: 



4+7n=21

We move all terms to the left:

4+7n-(21)=0

We add all the numbers together, and all the variables

7n-17=0

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

7n=17

n=17/7

n=2+3/7

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