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7(6-2n)=126
We move all terms to the left:
7(6-2n)-(126)=0
We add all the numbers together, and all the variables
7(-2n+6)-126=0
We multiply parentheses
-14n+42-126=0
We add all the numbers together, and all the variables
-14n-84=0
We move all terms containing n to the left, all other terms to the right
-14n=84
n=84/-14
n=-6
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