21+3n=51

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Solution for 21+3n=51 equation: 



21+3n=51

We move all terms to the left:

21+3n-(51)=0

We add all the numbers together, and all the variables

3n-30=0

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

3n=30

n=30/3

n=10

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