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15-n+6n+7=4n+n
We move all terms to the left:
15-n+6n+7-(4n+n)=0
We add all the numbers together, and all the variables
-n+6n-(+5n)+15+7=0
We add all the numbers together, and all the variables
5n-(+5n)+22=0
We get rid of parentheses
5n-5n+22=0
We add all the numbers together, and all the variables
22!=0
There is no solution for this equation
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