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12=8a-135a+12=-135a=-25a=-5
We move all terms to the left:
12-(8a-135a+12)=0
We add all the numbers together, and all the variables
-(-127a+12)+12=0
We get rid of parentheses
127a-12+12=0
We add all the numbers together, and all the variables
127a=0
a=0/127
a=0
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