10n=21+3n

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Solution for 10n=21+3n equation: 



10n=21+3n

We move all terms to the left:

10n-(21+3n)=0

We add all the numbers together, and all the variables

10n-(3n+21)=0

We get rid of parentheses

10n-3n-21=0

We add all the numbers together, and all the variables

7n-21=0

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

7n=21

n=21/7

n=3

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