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a=2+3a=8
We move all terms to the left:
a-(2+3a)=0
We add all the numbers together, and all the variables
a-(3a+2)=0
We get rid of parentheses
a-3a-2=0
We add all the numbers together, and all the variables
-2a-2=0
We move all terms containing a to the left, all other terms to the right
-2a=2
a=2/-2
a=-1
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