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(2+x)12=108
We move all terms to the left:
(2+x)12-(108)=0
We add all the numbers together, and all the variables
(x+2)12-108=0
We multiply parentheses
12x+24-108=0
We add all the numbers together, and all the variables
12x-84=0
We move all terms containing x to the left, all other terms to the right
12x=84
x=84/12
x=7
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