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2n+3=12+
We move all terms to the left:
2n+3-(12+)=0
We add all the numbers together, and all the variables
2n+3-0=0
We add all the numbers together, and all the variables
2n+3=0
We move all terms containing n to the left, all other terms to the right
2n=-3
n=-3/2
n=-1+1/2
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