6n+21=3

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Solution for 6n+21=3 equation: 



6n+21=3

We move all terms to the left:

6n+21-(3)=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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