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4=2+(12a)
We move all terms to the left:
4-(2+(12a))=0
We add all the numbers together, and all the variables
-(12a+2)+4=0
We get rid of parentheses
-12a-2+4=0
We add all the numbers together, and all the variables
-12a+2=0
We move all terms containing a to the left, all other terms to the right
-12a=-2
a=-2/-12
a=1/6
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