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4n+20-8=8-8
We move all terms to the left:
4n+20-8-(8-8)=0
We add all the numbers together, and all the variables
4n+20-8-0=0
We add all the numbers together, and all the variables
4n+12=0
We move all terms containing n to the left, all other terms to the right
4n=-12
n=-12/4
n=-3
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