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8+(x-12)=30
We move all terms to the left:
8+(x-12)-(30)=0
We add all the numbers together, and all the variables
(x-12)-22=0
We get rid of parentheses
x-12-22=0
We add all the numbers together, and all the variables
x-34=0
We move all terms containing x to the left, all other terms to the right
x=34
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