9n=2n+21

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Solution for 9n=2n+21 equation:



9n=2n+21
We move all terms to the left:
9n-(2n+21)=0
We get rid of parentheses
9n-2n-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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