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-7n+18=8+12-7n
We move all terms to the left:
-7n+18-(8+12-7n)=0
We add all the numbers together, and all the variables
-7n-(-7n+20)+18=0
We get rid of parentheses
-7n+7n-20+18=0
We add all the numbers together, and all the variables
-2!=0
There is no solution for this equation
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