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-12x+39=56-4x-17
We move all terms to the left:
-12x+39-(56-4x-17)=0
We add all the numbers together, and all the variables
-12x-(-4x+39)+39=0
We get rid of parentheses
-12x+4x-39+39=0
We add all the numbers together, and all the variables
-8x=0
x=0/-8
x=0
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