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8a-12=-12+8a
We move all terms to the left:
8a-12-(-12+8a)=0
We add all the numbers together, and all the variables
8a-(8a-12)-12=0
We get rid of parentheses
8a-8a+12-12=0
We add all the numbers together, and all the variables
=0
a=0/1
a=0
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