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10n+10n+20=20n+5
We move all terms to the left:
10n+10n+20-(20n+5)=0
We add all the numbers together, and all the variables
20n-(20n+5)+20=0
We get rid of parentheses
20n-20n-5+20=0
We add all the numbers together, and all the variables
15!=0
There is no solution for this equation
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