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12n+22=10n+2n+7
We move all terms to the left:
12n+22-(10n+2n+7)=0
We add all the numbers together, and all the variables
12n-(12n+7)+22=0
We get rid of parentheses
12n-12n-7+22=0
We add all the numbers together, and all the variables
15!=0
There is no solution for this equation
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