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-4(3x+1)=-12x-4
We move all terms to the left:
-4(3x+1)-(-12x-4)=0
We multiply parentheses
-12x-(-12x-4)-4=0
We get rid of parentheses
-12x+12x+4-4=0
We add all the numbers together, and all the variables
=0
x=0/1
x=0
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