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n+16+126+n+30+134=n-12+161
We move all terms to the left:
n+16+126+n+30+134-(n-12+161)=0
We add all the numbers together, and all the variables
n+n-(n+149)+16+126+30+134=0
We add all the numbers together, and all the variables
2n-(n+149)+306=0
We get rid of parentheses
2n-n-149+306=0
We add all the numbers together, and all the variables
n+157=0
We move all terms containing n to the left, all other terms to the right
n=-157
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