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-2(1+7n)-5=105
We move all terms to the left:
-2(1+7n)-5-(105)=0
We add all the numbers together, and all the variables
-2(7n+1)-5-105=0
We add all the numbers together, and all the variables
-2(7n+1)-110=0
We multiply parentheses
-14n-2-110=0
We add all the numbers together, and all the variables
-14n-112=0
We move all terms containing n to the left, all other terms to the right
-14n=112
n=112/-14
n=-8
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