12n=21+5n

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Solution for 12n=21+5n equation:



12n=21+5n
We move all terms to the left:
12n-(21+5n)=0
We add all the numbers together, and all the variables
12n-(5n+21)=0
We get rid of parentheses
12n-5n-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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