3n-45=21

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Solution for 3n-45=21 equation: 



3n-45=21

We move all terms to the left:

3n-45-(21)=0

We add all the numbers together, and all the variables

3n-66=0

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

3n=66

n=66/3

n=22

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