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3n+4n-2=(3+4)n-2=
We move all terms to the left:
3n+4n-2-((3+4)n-2)=0
We add all the numbers together, and all the variables
3n+4n-(7n-2)-2=0
We add all the numbers together, and all the variables
7n-(7n-2)-2=0
We get rid of parentheses
7n-7n+2-2=0
We add all the numbers together, and all the variables
=0
n=0/1
n=0
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