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12+5n=7n-2n+8
We move all terms to the left:
12+5n-(7n-2n+8)=0
We add all the numbers together, and all the variables
5n-(5n+8)+12=0
We get rid of parentheses
5n-5n-8+12=0
We add all the numbers together, and all the variables
4!=0
There is no solution for this equation
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