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2(3n+1)-7n=4
We move all terms to the left:
2(3n+1)-7n-(4)=0
We add all the numbers together, and all the variables
-7n+2(3n+1)-4=0
We multiply parentheses
-7n+6n+2-4=0
We add all the numbers together, and all the variables
-1n-2=0
We move all terms containing n to the left, all other terms to the right
-n=2
n=2/-1
n=-2
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