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12+(x+2)=6+(2+1)
We move all terms to the left:
12+(x+2)-(6+(2+1))=0
We add all the numbers together, and all the variables
(x+2)+12-(6+3)=0
We add all the numbers together, and all the variables
(x+2)+3=0
We get rid of parentheses
x+2+3=0
We add all the numbers together, and all the variables
x+5=0
We move all terms containing x to the left, all other terms to the right
x=-5
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