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x+(56/(x+12))=3
We move all terms to the left:
x+(56/(x+12))-(3)=0
Domain of the equation: (x+12))!=0We multiply all the terms by the denominator
x∈R
x*(x+12))+(56-3*(x+12))=0
We multiply parentheses
x*(x+12))+(56-3x-=0
We add all the numbers together, and all the variables
-3x+x*(x+12))+(56=0
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