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-4x+(4x+12)=-1
We move all terms to the left:
-4x+(4x+12)-(-1)=0
We add all the numbers together, and all the variables
-4x+(4x+12)+1=0
We get rid of parentheses
-4x+4x+12+1=0
We add all the numbers together, and all the variables
13!=0
There is no solution for this equation
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